Stéphanie Queiroz Roque, L. Falcão, A. Rech, J. Silva, P. S. Oliveira, Kleiperry Freitas Ferreira, M. M. do Espírito Santo
{"title":"巴西塞拉多保存区和退化区核桃科植物的生殖生物学研究","authors":"Stéphanie Queiroz Roque, L. Falcão, A. Rech, J. Silva, P. S. Oliveira, Kleiperry Freitas Ferreira, M. M. do Espírito Santo","doi":"10.1139/cjb-2022-0132","DOIUrl":null,"url":null,"abstract":"This study aimed to characterize the reproductive system and determine the importance of pollinators for fruit production of C. brasiliense, an economically important tree, in preserved and degraded Cerrado areas in southeastern Brazil. For this purpose, we performed pollinator exclusion experiments to determine the frequency of self- and cross-pollination, and to determine fruit set. In general, fruit set was extremely low: only 2.92% and 2.71% of the flowers developed into fruits in the degraded and preserved areas, respectively. Fruit set by manual cross-pollination and natural (open) pollination were higher than self-pollination in both areas. Pollen deposition was significantly higher at night and in the preserved area, although a relatively high amount of pollen grains found in the stigmas during the day. The number of ripened and aborted seeds did not differ among areas, but fruits and seeds were heavier in the degraded area than in the preserved area. The abortion level was very high (64.5%), which may be related to low pollen quality due to selfing. Our study presents evidence that Cerrado degradation affects the reproductive biology of C. brasiliense, but whether such effect is a consequence of pollinator decline in degraded areas remains to be determined.","PeriodicalId":9092,"journal":{"name":"Botany","volume":" ","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"REPRODUCTIVE BIOLOGY OF CARYOCAR BRASILIENSE (CARYOCARACEAE) IN PRESERVED AND DEGRADED CERRADO AREAS IN BRAZIL\",\"authors\":\"Stéphanie Queiroz Roque, L. Falcão, A. Rech, J. Silva, P. S. Oliveira, Kleiperry Freitas Ferreira, M. M. do Espírito Santo\",\"doi\":\"10.1139/cjb-2022-0132\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This study aimed to characterize the reproductive system and determine the importance of pollinators for fruit production of C. brasiliense, an economically important tree, in preserved and degraded Cerrado areas in southeastern Brazil. For this purpose, we performed pollinator exclusion experiments to determine the frequency of self- and cross-pollination, and to determine fruit set. In general, fruit set was extremely low: only 2.92% and 2.71% of the flowers developed into fruits in the degraded and preserved areas, respectively. Fruit set by manual cross-pollination and natural (open) pollination were higher than self-pollination in both areas. Pollen deposition was significantly higher at night and in the preserved area, although a relatively high amount of pollen grains found in the stigmas during the day. The number of ripened and aborted seeds did not differ among areas, but fruits and seeds were heavier in the degraded area than in the preserved area. The abortion level was very high (64.5%), which may be related to low pollen quality due to selfing. Our study presents evidence that Cerrado degradation affects the reproductive biology of C. brasiliense, but whether such effect is a consequence of pollinator decline in degraded areas remains to be determined.\",\"PeriodicalId\":9092,\"journal\":{\"name\":\"Botany\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2023-04-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Botany\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1139/cjb-2022-0132\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Botany","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1139/cjb-2022-0132","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
REPRODUCTIVE BIOLOGY OF CARYOCAR BRASILIENSE (CARYOCARACEAE) IN PRESERVED AND DEGRADED CERRADO AREAS IN BRAZIL
This study aimed to characterize the reproductive system and determine the importance of pollinators for fruit production of C. brasiliense, an economically important tree, in preserved and degraded Cerrado areas in southeastern Brazil. For this purpose, we performed pollinator exclusion experiments to determine the frequency of self- and cross-pollination, and to determine fruit set. In general, fruit set was extremely low: only 2.92% and 2.71% of the flowers developed into fruits in the degraded and preserved areas, respectively. Fruit set by manual cross-pollination and natural (open) pollination were higher than self-pollination in both areas. Pollen deposition was significantly higher at night and in the preserved area, although a relatively high amount of pollen grains found in the stigmas during the day. The number of ripened and aborted seeds did not differ among areas, but fruits and seeds were heavier in the degraded area than in the preserved area. The abortion level was very high (64.5%), which may be related to low pollen quality due to selfing. Our study presents evidence that Cerrado degradation affects the reproductive biology of C. brasiliense, but whether such effect is a consequence of pollinator decline in degraded areas remains to be determined.
期刊介绍:
Botany features comprehensive research articles and notes in all segments of plant sciences, including cell and molecular biology, ecology, mycology and plant-microbe interactions, phycology, physiology and biochemistry, structure and development, genetics, systematics, and phytogeography. It also publishes methods, commentary, and review articles on topics of current interest, contributed by internationally recognized scientists.