International Journal of Plant Sciences, Ahead of Print.
国际植物科学杂志》，提前出版。
{"title":"Variable Investment into Cleistogamous Reproduction in Populations of Two Grass Species from Eastern North America","authors":"Gregory P. Cheplick","doi":"10.1086/731944","DOIUrl":"https://doi.org/10.1086/731944","url":null,"abstract":"International Journal of Plant Sciences, Ahead of Print. <br/>","PeriodicalId":14306,"journal":{"name":"INTERNATIONAL JOURNAL OF PLANT SCIENCES","volume":"286 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142221945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Edward J. Spagnuolo, Peter Wilf, John-Paul Zonneveld, David Shaw, Aswan, Yan Rizal, Yahdi Zaim, Jonathan I. Bloch, Russell L. Ciochon
International Journal of Plant Sciences, Ahead of Print.
国际植物科学杂志》，提前出版。
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Premise of research. Seed ontogeny between fertilization and seed maturity is a neglected life history stage in demographic studies, yet this period may have profound consequences for seed set and seedling vigor. For plant species with multiovulate linear fruits, it is possible to record the relative position of each ovule, thereby allowing investigators to assess whether ovule development occurs at random or whether it exhibits unique discernible patterns within fruits. We studied effects of ovule position on patterns of ovule development, seed mass, and seedling size within linear pods of Cercis canadensis.Methodology. Fruits were collected from multiple trees at each of three sites in southeastern Michigan. Intraovary ovule position and developmental fate (i.e., undeveloped ovule, aborted ovule, insect-damaged seed, and mature seed) and seed mass were determined. Seedling performance from three seed size classes was also monitored. Seedling traits included days to emergence, height, leaf area, and seedling biomass.Pivotal results. Three-fourths or more of all ovules within fruits across the populations reached seed maturity. Patterns of seed maturation and abortion were nonrandom and significantly depended on populations, individuals, and ovule positions within fruits. Probability of seed maturation within individual fruits was lowest at the basal end and highest at either the center or the distal end, suggesting the existence of a fertilization gradient. Conversely, frequencies of undeveloped ovules and aborted seeds were highest at the bases of fruits. Insect-damaged seeds accounted for 1%–3% of all ovules and occurred randomly. Seeds located in basal sections of fruits were also smaller than seeds located in central and distal sections. Seed mass was positively correlated with all measures of seedling performance.Conclusions. Patterns of ovule development and seed maturation were determined to be nonrandom within fruits of C. canadensis. Ovule position influences abortion and maturation of seeds, seed mass, and early seedling vigor and has the potential to affect overall plant fitness.
研究前提。从受精到种子成熟之间的种子本体发育是人口统计学研究中一个被忽视的生命史阶段，但这一时期可能对种子的结实和幼苗的活力有深远影响。对于具有多胚珠线形果实的植物物种来说，记录每个胚珠的相对位置是可能的，从而使研究人员能够评估胚珠的发育是随机发生的，还是在果实内表现出独特的可识别模式。我们研究了胚珠位置对 Cercis canadensis 线形豆荚内胚珠发育模式、种子质量和幼苗大小的影响。在密歇根州东南部的三个地点分别从多棵树上采集果实。测定了胚珠内位置和发育命运（即未发育胚珠、流产胚珠、虫害种子和成熟种子）以及种子质量。还监测了三个种子大小等级的幼苗表现。幼苗性状包括出苗天数、高度、叶面积和幼苗生物量。各群体果实中四分之三或更多的胚珠达到种子成熟。种子成熟和流产的模式是非随机的，在很大程度上取决于种群、个体和胚珠在果实中的位置。单个果实内种子成熟的概率在基部最低，而在中部或远端最高，这表明存在受精梯度。相反，未发育胚珠和流产种子的频率在果实基部最高。虫害种子占胚珠总数的 1%-3%，随机出现。位于果实基部的种子也比位于中部和远端部分的种子小。种子质量与幼苗表现的所有指标呈正相关。结论：可以确定 C. canadensis 果实内的胚珠发育和种子成熟模式是非随机的。胚珠位置会影响种子的流产和成熟、种子质量和早期幼苗活力，并有可能影响植物的整体适应性。
{"title":"Effects of Ovule Position on Seed Maturation, Seed Mass, and Seedling Size in Eastern Redbud (Cercis canadensis)","authors":"David J. Susko, Asma N. Jamil","doi":"10.1086/730118","DOIUrl":"https://doi.org/10.1086/730118","url":null,"abstract":"<i>Premise of research</i>. Seed ontogeny between fertilization and seed maturity is a neglected life history stage in demographic studies, yet this period may have profound consequences for seed set and seedling vigor. For plant species with multiovulate linear fruits, it is possible to record the relative position of each ovule, thereby allowing investigators to assess whether ovule development occurs at random or whether it exhibits unique discernible patterns within fruits. We studied effects of ovule position on patterns of ovule development, seed mass, and seedling size within linear pods of <i>Cercis canadensis</i>.<i>Methodology</i>. Fruits were collected from multiple trees at each of three sites in southeastern Michigan. Intraovary ovule position and developmental fate (i.e., undeveloped ovule, aborted ovule, insect-damaged seed, and mature seed) and seed mass were determined. Seedling performance from three seed size classes was also monitored. Seedling traits included days to emergence, height, leaf area, and seedling biomass.<i>Pivotal results</i>. Three-fourths or more of all ovules within fruits across the populations reached seed maturity. Patterns of seed maturation and abortion were nonrandom and significantly depended on populations, individuals, and ovule positions within fruits. Probability of seed maturation within individual fruits was lowest at the basal end and highest at either the center or the distal end, suggesting the existence of a fertilization gradient. Conversely, frequencies of undeveloped ovules and aborted seeds were highest at the bases of fruits. Insect-damaged seeds accounted for 1%–3% of all ovules and occurred randomly. Seeds located in basal sections of fruits were also smaller than seeds located in central and distal sections. Seed mass was positively correlated with all measures of seedling performance.<i>Conclusions</i>. Patterns of ovule development and seed maturation were determined to be nonrandom within fruits of <i>C. canadensis</i>. Ovule position influences abortion and maturation of seeds, seed mass, and early seedling vigor and has the potential to affect overall plant fitness.","PeriodicalId":14306,"journal":{"name":"INTERNATIONAL JOURNAL OF PLANT SCIENCES","volume":"58 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Genetic architecture of novel floral organs","authors":"Andrea Appleton, Elena Kramer","doi":"10.1086/729359","DOIUrl":"https://doi.org/10.1086/729359","url":null,"abstract":"","PeriodicalId":14306,"journal":{"name":"INTERNATIONAL JOURNAL OF PLANT SCIENCES","volume":"80 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139383599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Wadgymar, Seema N Sheth, Emily B Josephs, Megan L. DeMarche, Jill T Anderson
{"title":"Defining fitness in evolutionary ecology","authors":"S. Wadgymar, Seema N Sheth, Emily B Josephs, Megan L. DeMarche, Jill T Anderson","doi":"10.1086/729360","DOIUrl":"https://doi.org/10.1086/729360","url":null,"abstract":"","PeriodicalId":14306,"journal":{"name":"INTERNATIONAL JOURNAL OF PLANT SCIENCES","volume":"6 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139381153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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