Pub Date : 2022-05-23DOI: 10.25223/brad.n40.2022.a14
Gideon F. Smith
Summary: The nothospecies name Kalanchoe ×edwardii (Crassulaceae subfam. Kalanchooideae) was published for the hybrid between the arborescent K. beharensis and the shrubby K. tomentosa, two Malagasy species. Two well-known cultivars, K. ×edwardii ‘Fang’ and K. ×edwardii ‘Rose Leaf’, or simply K. ‘Fang’ and K. ‘Rose Leaf’, have been selected and named from K. ×edwardii. To facilitate distinguishing between these two cultivars, differences between them are tabulated and discussed. A general discussion of aspects of interspecific hybridisation in Kalanchoe is provided.
{"title":"Identity of Kalanchoe ‘Fang’ and K. ‘Rose Leaf’, two cultivars derived from K. ×edwardii (Crassulaceae subfam. Kalanchooideae), with notes on aspects of interspecific hybridisation in the genus","authors":"Gideon F. Smith","doi":"10.25223/brad.n40.2022.a14","DOIUrl":"https://doi.org/10.25223/brad.n40.2022.a14","url":null,"abstract":"Summary: The nothospecies name Kalanchoe ×edwardii (Crassulaceae subfam. Kalanchooideae) was published for the hybrid between the arborescent K. beharensis and the shrubby K. tomentosa, two Malagasy species. Two well-known cultivars, K. ×edwardii ‘Fang’ and K. ×edwardii ‘Rose Leaf’, or simply K. ‘Fang’ and K. ‘Rose Leaf’, have been selected and named from K. ×edwardii. To facilitate distinguishing between these two cultivars, differences between them are tabulated and discussed. A general discussion of aspects of interspecific hybridisation in Kalanchoe is provided.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42692182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.sp40.2022.a10
M. González-Elizondo, M. González-Elizondo, Lizeth Ruacho-González
Summary: Echinocereus adustus, E. pamanesii and E. schereri are three morphological related, little known species from northwestern Mexico. In order to assess their conservation status, data on their distribution and ecological conditions were gathered from herbarium specimens, field work and databases. A data matrix of about 140 records was obtained. After curating those, eighty-eight records were kept of E. adustus subsp. adustus, E. adustus subsp. schwarzii, E. pamanesii and E. shereri. Distribution maps were generated on biogeographic provinces and ecoregions, and maps of the Area of Occupancy (AOO) and Extent of Occurrence (EOO) were prepared for each taxon. We propose to update the conservation status to Endangered for E. adustus (which has a wide distribution but very restricted occupation area) and E. schereri (restricted distribution and locally very rare), and to Near Threathened for E. pamanesii, which has a small Area of Occupancy and Extent of Occurrence but is locally common in an area not exposed to agricultural activities.
摘要:adusstus、E. pamanesii和E. schereri是墨西哥西北部三种形态相近但鲜为人知的物种。为了评估其保护状况，从植物标本馆标本、野外工作和数据库中收集了其分布和生态状况的数据。得到了约140条记录的数据矩阵。整理后，保存了八十八份水蛭的记录。水蛭属;水蛭属;schwarzii, E. pamanesii和E. shereri。绘制了生物地理省、生态区分布图，并绘制了各分类单元的占用面积(Area of Occupancy, AOO)和发生范围(Extent of Occurrence, EOO)分布图。我们建议将adusstus(分布广泛，但占用区域非常有限)和schereri(分布有限，在当地非常罕见)的保护状态更新为濒危状态，将E. pamanesii(占用面积和发生范围较小，但在未暴露于农业活动的地区普遍存在)的保护状态更新为近威胁状态。
{"title":"Notes on distribution and conservation status of three Echinocereus (Cactaceae) species from northwest Mexico","authors":"M. González-Elizondo, M. González-Elizondo, Lizeth Ruacho-González","doi":"10.25223/brad.sp40.2022.a10","DOIUrl":"https://doi.org/10.25223/brad.sp40.2022.a10","url":null,"abstract":"Summary: Echinocereus adustus, E. pamanesii and E. schereri are three morphological related, little known species from northwestern Mexico. In order to assess their conservation status, data on their distribution and ecological conditions were gathered from herbarium specimens, field work and databases. A data matrix of about 140 records was obtained. After curating those, eighty-eight records were kept of E. adustus subsp. adustus, E. adustus subsp. schwarzii, E. pamanesii and E. shereri. Distribution maps were generated on biogeographic provinces and ecoregions, and maps of the Area of Occupancy (AOO) and Extent of Occurrence (EOO) were prepared for each taxon. We propose to update the conservation status to Endangered for E. adustus (which has a wide distribution but very restricted occupation area) and E. schereri (restricted distribution and locally very rare), and to Near Threathened for E. pamanesii, which has a small Area of Occupancy and Extent of Occurrence but is locally common in an area not exposed to agricultural activities.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41645949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.n40.2022.a19
Colin Walker
Summary: Palmer's Culture des Cactées was published in Paris in 1867 during the first cactus cornucopia in mid-nineteenth-century France. The contents of the book are summarised and its illustrations are discussed in detail. For its time, it is well illustrated with thirty-three engravings, for which sources of just ten have been identified. Original sources for six of Palmer's engravings are illustrated here for comparison. Britton & Rose (1919–1923) cited twelve of the engravings, indicating their historical significance. As a growers' guide the book compares favourably with those published in 1845 and 1868 by Charles Lemaire, Palmer's contemporary and leading light in the French cactus scene at that time. The rarity of Palmer's book is indicated by the fact that only seventeen copies have been located, details of which are tabulated.
{"title":"Palmer's Culture des Cactées – a rare cactus book","authors":"Colin Walker","doi":"10.25223/brad.n40.2022.a19","DOIUrl":"https://doi.org/10.25223/brad.n40.2022.a19","url":null,"abstract":"Summary: Palmer's Culture des Cactées was published in Paris in 1867 during the first cactus cornucopia in mid-nineteenth-century France. The contents of the book are summarised and its illustrations are discussed in detail. For its time, it is well illustrated with thirty-three engravings, for which sources of just ten have been identified. Original sources for six of Palmer's engravings are illustrated here for comparison. Britton & Rose (1919–1923) cited twelve of the engravings, indicating their historical significance. As a growers' guide the book compares favourably with those published in 1845 and 1868 by Charles Lemaire, Palmer's contemporary and leading light in the French cactus scene at that time. The rarity of Palmer's book is indicated by the fact that only seventeen copies have been located, details of which are tabulated.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41814863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.sp40.2022.a17
Gideon F. Smith, R. Klopper
Summary: The conservation status of Aloe davyana, A. davyana var. subolifera, and A. labiaflava (Asphodelaceae subfam. Alooideae) is discussed. These three taxa were recently reinstated as accepted species (A. davyana and A. labiaflava), with A. davyana var. subolifera included as the only non-autonymic variety in A. davyana. Of these three aloes, the autonymic A. davyana and A. davyana var. subolifera are of Least Concern, while A. labiaflava is Endangered.
{"title":"Conservation status of the recently reinstated Aloe davyana, A. davyana var. subolifera, and A. labiaflava (Asphodelaceae subfam. Alooideae), three maculate aloes endemic to South Africa","authors":"Gideon F. Smith, R. Klopper","doi":"10.25223/brad.sp40.2022.a17","DOIUrl":"https://doi.org/10.25223/brad.sp40.2022.a17","url":null,"abstract":"Summary: The conservation status of Aloe davyana, A. davyana var. subolifera, and A. labiaflava (Asphodelaceae subfam. Alooideae) is discussed. These three taxa were recently reinstated as accepted species (A. davyana and A. labiaflava), with A. davyana var. subolifera included as the only non-autonymic variety in A. davyana. Of these three aloes, the autonymic A. davyana and A. davyana var. subolifera are of Least Concern, while A. labiaflava is Endangered.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46462324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.sp40.2022.a13
Igor Silva da Hora, M. Meiado
Summary: Melocactus Link & Otto is one of the most representative and endangered genera of Cactaceae in Sergipe. This study evaluates ex situ conservation under two integrative approaches: the rescue of adult plants to set a germplasm bank and the analysis of different substrates to establish a seedling bank of rescued species. We collected thirty individuals of each species and cultivated them in a greenhouse for twelve months. We evaluated the number of flowers, fruits, and seeds daily, as well as the mortality rate of adult plants. We evaluated five substrates to establish the seedling bank 1 – sand, 2 – sand + commercial soil (1:1), 3 – sand + goat manure (1:1), 4 – soil (100% volume) and 5 – soil + goat manure (1:1). We found mortality rates of 0%, 10% and 50% for M. zehntneri, M. violaceus subsp. margaritaceus and M. sergipensis, respectively. We found two phenological patterns for the species in the germplasm bank: a continuous production of flowers, fruits and seeds throughout the year and another pattern, with periods of greater production of flowers, fruits, and seeds. We also found positive correlations between the environmental factors and the phenological stages of the species. We conclude that substrates ‘sand’ and ‘sand + soil’ are the most suitable to produce seedlings of the three species of Melocactus.
摘要:Melocactus Link & Otto是Sergipe仙人掌科最具代表性和濒危的属之一。本研究在两种综合方法下对迁地保护进行了评价:一种是通过拯救成虫建立种质资源库，另一种是通过分析不同基质建立被拯救种苗库。我们收集了每个物种的30个个体，并在温室中培养了12个月。我们评估了每天花、果实和种子的数量，以及成虫的死亡率。采用5种基质建立苗库:1 -沙、2 -沙+商品土(1:1)、3 -沙+羊粪(1:1)、4 -土(100%积)和5 -土+羊粪(1:1)。我们发现zehntneri、violaceus亚种的死亡率分别为0%、10%和50%。分别为margaritaceus和M. sergipensis。我们在种质资源库中发现了该物种的两种物候模式:一种全年持续生产花、果和种子的模式，另一种模式是花、果和种子大量生产的时期。我们还发现环境因子与物种物候阶段呈正相关。结果表明，“砂”和“砂+土”基质最适合三种竹属植物的育苗。
{"title":"Integrative approaches to ex situ conservation of endangered Melocactus from Brazilian ecosystems","authors":"Igor Silva da Hora, M. Meiado","doi":"10.25223/brad.sp40.2022.a13","DOIUrl":"https://doi.org/10.25223/brad.sp40.2022.a13","url":null,"abstract":"Summary: Melocactus Link & Otto is one of the most representative and endangered genera of Cactaceae in Sergipe. This study evaluates ex situ conservation under two integrative approaches: the rescue of adult plants to set a germplasm bank and the analysis of different substrates to establish a seedling bank of rescued species. We collected thirty individuals of each species and cultivated them in a greenhouse for twelve months. We evaluated the number of flowers, fruits, and seeds daily, as well as the mortality rate of adult plants. We evaluated five substrates to establish the seedling bank 1 – sand, 2 – sand + commercial soil (1:1), 3 – sand + goat manure (1:1), 4 – soil (100% volume) and 5 – soil + goat manure (1:1). We found mortality rates of 0%, 10% and 50% for M. zehntneri, M. violaceus subsp. margaritaceus and M. sergipensis, respectively. We found two phenological patterns for the species in the germplasm bank: a continuous production of flowers, fruits and seeds throughout the year and another pattern, with periods of greater production of flowers, fruits, and seeds. We also found positive correlations between the environmental factors and the phenological stages of the species. We conclude that substrates ‘sand’ and ‘sand + soil’ are the most suitable to produce seedlings of the three species of Melocactus.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46509009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.n40.2022.a3
A. E. Razo-León, A. Muñoz-Urias, M. G. Campos-Porras, F. M. Huerta-Martínez, H. Fierros-López
Summary: The animals that visit the flowers, pollinators and reproductive system of Opuntia joconostle were studied. The objectives of the work were to identify its floral visitors, to determine which are the most effective pollinators and to evaluate the importance of floral visitors in seed production. To determine the richness and frequency of the animal visitors, five study visits were made from May to June 2017, during which the animals that interacted with the flowers were recorded and collected for a period of thirty minutes for each hour between 10am and 16pm, after which the pollen grains were removed from the body of the collected specimens. For pollination efficiency, the pollen deposited by a specific pollinator in a single visit on the stigma and by self-pollination was counted and seed production from flowers where pollinator visits were avoided and another group with no restrictions were compared. A total of 2,261 floral visitors were recorded, belonging to four orders, eleven families, and twenty-seven species. Bees were the most abundant floral visitors with 98% of the records; the species with the highest number of visits was Apis mellifera with 90%, followed by Diadasia australis with 5%. A higher number of pollen grains per insect were recorded in D. australis than in A. mellifera, D. australis deposited more pollen per visit than A. mellifera and by self-pollination. Flowers that received pollinators produced significantly more seeds per fruit than flowers where visitors were prevented. O. joconostle flowers are used by many animals, however, the majority are bees, particularly two species: A. mellifera and D. australis, the former having a higher frequency of visitation. However, D. australis carries and deposits more pollen. Joconostle seems to have a mixed autogamy/ xenogamy crossing system, as self-pollination was recorded, although it negatively affected seed production. Thus, cross-pollination is important for the conservation of this species, increasing its chances of reproductive success by seed and preserving genetic diversity.
{"title":"Flower visitors and efficient pollinators of Opuntia joconostle F.A.C.Weber. ex Diguet in Jalisco, Mexico","authors":"A. E. Razo-León, A. Muñoz-Urias, M. G. Campos-Porras, F. M. Huerta-Martínez, H. Fierros-López","doi":"10.25223/brad.n40.2022.a3","DOIUrl":"https://doi.org/10.25223/brad.n40.2022.a3","url":null,"abstract":"Summary: The animals that visit the flowers, pollinators and reproductive system of Opuntia joconostle were studied. The objectives of the work were to identify its floral visitors, to determine which are the most effective pollinators and to evaluate the importance of floral visitors in seed production. To determine the richness and frequency of the animal visitors, five study visits were made from May to June 2017, during which the animals that interacted with the flowers were recorded and collected for a period of thirty minutes for each hour between 10am and 16pm, after which the pollen grains were removed from the body of the collected specimens. For pollination efficiency, the pollen deposited by a specific pollinator in a single visit on the stigma and by self-pollination was counted and seed production from flowers where pollinator visits were avoided and another group with no restrictions were compared. A total of 2,261 floral visitors were recorded, belonging to four orders, eleven families, and twenty-seven species. Bees were the most abundant floral visitors with 98% of the records; the species with the highest number of visits was Apis mellifera with 90%, followed by Diadasia australis with 5%. A higher number of pollen grains per insect were recorded in D. australis than in A. mellifera, D. australis deposited more pollen per visit than A. mellifera and by self-pollination. Flowers that received pollinators produced significantly more seeds per fruit than flowers where visitors were prevented. O. joconostle flowers are used by many animals, however, the majority are bees, particularly two species: A. mellifera and D. australis, the former having a higher frequency of visitation. However, D. australis carries and deposits more pollen. Joconostle seems to have a mixed autogamy/ xenogamy crossing system, as self-pollination was recorded, although it negatively affected seed production. Thus, cross-pollination is important for the conservation of this species, increasing its chances of reproductive success by seed and preserving genetic diversity.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41414456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.sp40.2022.a4
P. Bruyns
Synopsis: On the basis of herbarium records, certain species of Euphorbia are identified as at risk because of their very restricted known distributions. This includes ten species in subg. Athymalus, one species in subg. Chamaesyce, one species in subg. Esula and nine species in subg. Euphorbia. A brief account is given of each, with illustrations.
{"title":"South African members of Euphorbia and their conservation status","authors":"P. Bruyns","doi":"10.25223/brad.sp40.2022.a4","DOIUrl":"https://doi.org/10.25223/brad.sp40.2022.a4","url":null,"abstract":"Synopsis: On the basis of herbarium records, certain species of Euphorbia are identified as at risk because of their very restricted known distributions. This includes ten species in subg. Athymalus, one species in subg. Chamaesyce, one species in subg. Esula and nine species in subg. Euphorbia. A brief account is given of each, with illustrations.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42540507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.sp40.2022.a2
N. Taylor, D. Zappi
Summary: The ex situ conservation of Leuenbergeria aureiflora (EN) and Pereskia bahiensis subsp. minensis (CR) (Cactaceae) by means of seed production for banking is described as an example of what can be achieved on a domestic scale, utilising plants of documented wild provenance.
{"title":"Conserving the genetic diversity of Brazilian leafy cacti on a domestic scale","authors":"N. Taylor, D. Zappi","doi":"10.25223/brad.sp40.2022.a2","DOIUrl":"https://doi.org/10.25223/brad.sp40.2022.a2","url":null,"abstract":"Summary: The ex situ conservation of Leuenbergeria aureiflora (EN) and Pereskia bahiensis subsp. minensis (CR) (Cactaceae) by means of seed production for banking is described as an example of what can be achieved on a domestic scale, utilising plants of documented wild provenance.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48942929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.n40.2022.a8
U. Eggli, Mario Giorgetta
Summary: Phemeranthus punae (R.E.Fr.) Eggli & Nyffeler (Montiaceae) is a perennial geophytic herb from the pre-Puna vegetation in the Andes of south-west Bolivia and north-west Argentina. Flowering plants have been observed for several seasons. Flowers are almost exclusively visited by at least three species of ants (Formicidae: likely Forelius pruinosus Roger, Linepithema sp. and Camponotus bruchi Forel). The ants move freely and rapidly on the plants and switch to neighbouring plants within less than five seconds. Pollen grains adhere to legs and bodies of the ants, which visit the flowers to feed on the nectar. The low stature of P. punae, its horizontally spreading to ascending inflorescences and the small flowers conform to the ant pollination syndrome characteristics formulated by Hickman (1974). It is concluded that the observed ants are the pollinators of the species in the study area.
{"title":"The pollination ecology of Phemeranthus punae (Montiaceae) in southern Bolivia","authors":"U. Eggli, Mario Giorgetta","doi":"10.25223/brad.n40.2022.a8","DOIUrl":"https://doi.org/10.25223/brad.n40.2022.a8","url":null,"abstract":"Summary: Phemeranthus punae (R.E.Fr.) Eggli & Nyffeler (Montiaceae) is a perennial geophytic herb from the pre-Puna vegetation in the Andes of south-west Bolivia and north-west Argentina. Flowering plants have been observed for several seasons. Flowers are almost exclusively visited by at least three species of ants (Formicidae: likely Forelius pruinosus Roger, Linepithema sp. and Camponotus bruchi Forel). The ants move freely and rapidly on the plants and switch to neighbouring plants within less than five seconds. Pollen grains adhere to legs and bodies of the ants, which visit the flowers to feed on the nectar. The low stature of P. punae, its horizontally spreading to ascending inflorescences and the small flowers conform to the ant pollination syndrome characteristics formulated by Hickman (1974). It is concluded that the observed ants are the pollinators of the species in the study area.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46755814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-23DOI: 10.25223/brad.n40.2022.a5
Ezequiel Córdova, R. P. López, D. Rojas, Óskar Zeballos, Lirio Calani, Paola Solares, Roberto Majluf, Fernando Velarde-Simonini
Summary: The Cactaceae are a characteristic component of arid zones in the American continent. Some species are known to possess a seed bank, as a way to cope with environmental uncertainty, albeit seeds usually lose viability with time. Seed banks may respond with a constant, low germination proportion (delayed germination) or germination may depend on rainfall amount (predictive germination). On the other hand, several species of cacti usually co-occur in one locality. In the case of large, columnar species, we would expect competition as a corollary of their history of coexistence. We conducted two irrigation experiments (three watering levels: 40, 60, 80mm) to assess how seed viability in one columnar cactus is lost as years pass (three years), and to determine differences in germination/ early survival between two dominant columnar, sympatric cacti (Trichocereus atacamensis (Phil.) W.T.Marshall & T.M.Bock, T. tarijensis (Vaupel) Werderm.) from the arid puna. We predicted seeds from more recent years would have greater germination fractions and survival, and that the two columnar cactus species would show differences in their regeneration niche in order to decrease competition. We found a tendency for greater germination in younger seeds, and no effect of seed age on survival. Seeds from one of the species (T. atacamensis) had twice as many survivors as the other species (T. tarijensis). Both species showed a predictive response to water, having greater germination proportions with more irrigation. In conclusion, seed age affected germination, the columnar cactus species had a predictive germination, and showed differences in some aspects of their regeneration niche.
{"title":"Trichocereus atacamensis (Phil.) W.T.Marshall & T.M.Bock (Cactaceae) shows decreasing germination fractions with seed age and differences in regeneration niche compared with a congeneric, sympatric species (T. tarijensis (Vaupel) Werderm.)","authors":"Ezequiel Córdova, R. P. López, D. Rojas, Óskar Zeballos, Lirio Calani, Paola Solares, Roberto Majluf, Fernando Velarde-Simonini","doi":"10.25223/brad.n40.2022.a5","DOIUrl":"https://doi.org/10.25223/brad.n40.2022.a5","url":null,"abstract":"Summary: The Cactaceae are a characteristic component of arid zones in the American continent. Some species are known to possess a seed bank, as a way to cope with environmental uncertainty, albeit seeds usually lose viability with time. Seed banks may respond with a constant, low germination proportion (delayed germination) or germination may depend on rainfall amount (predictive germination). On the other hand, several species of cacti usually co-occur in one locality. In the case of large, columnar species, we would expect competition as a corollary of their history of coexistence. We conducted two irrigation experiments (three watering levels: 40, 60, 80mm) to assess how seed viability in one columnar cactus is lost as years pass (three years), and to determine differences in germination/ early survival between two dominant columnar, sympatric cacti (Trichocereus atacamensis (Phil.) W.T.Marshall & T.M.Bock, T. tarijensis (Vaupel) Werderm.) from the arid puna. We predicted seeds from more recent years would have greater germination fractions and survival, and that the two columnar cactus species would show differences in their regeneration niche in order to decrease competition. We found a tendency for greater germination in younger seeds, and no effect of seed age on survival. Seeds from one of the species (T. atacamensis) had twice as many survivors as the other species (T. tarijensis). Both species showed a predictive response to water, having greater germination proportions with more irrigation. In conclusion, seed age affected germination, the columnar cactus species had a predictive germination, and showed differences in some aspects of their regeneration niche.","PeriodicalId":50726,"journal":{"name":"Bradleya","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43664595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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