Occurrence and Prevention of Delayed Autonomous Selfing in Salvia umbratica (Lamiaceae)

doi:10.3389/fpls.2021.635310

KIB OpenIR

	Occurrence and Prevention of Delayed Autonomous Selfing in Salvia umbratica (Lamiaceae)
	Xiao,Han-Wen ; Huang,Yan-Bo ; Chang,Yu-Hang ; Chen,Yun ; Abbott,Richard J.; Wei,Yu-Kun ; Ma,Yong-Peng
	2021
发表期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
卷号	12 页码:635310
摘要	Delayed autonomous selfing (DAS) provides reproductive assurance under conditions of pollinator and/or pollen-limitation. Few plant species have been investigated to determine if DAS is terminated when a flower is sufficiently pollinated by a pollen vector, thereby saving plant resources for other purposes. We examined this possibility in bumblebee-pollinated Salvia umbratica. We first showed that DAS resulting in high fruit set (100%) and seed set (>80%) per flower occurred in the absence of insect pollinators by means of style recurvature and was completed in 94% of flowers 72 h after they opened. In contrast, in flowers pollinated immediately after opening, DAS was prevented by corollas dropping away before styles recurve toward the upper thecae. We next showed that hand-pollination of flowers immediately after they opened resulted in high fruit set (100%) and seed set (>80%) when 5-10 pollen grains or more were deposited on their stigmas, whereas fruit set and seed set were reduced to 45.00 and 22.50%, respectively, when pollen loads were reduced to 1-3 pollen grains. Finally, we showed that on average single pollinator visits deposited 26 pollen grains on stigmas of flowers that had just opened, which is more than enough to ensure high fruit and seed set. Our results indicate that flower longevity is highly correlated with the pollinator environment and female fitness of S. umbratica, with extended flower longevity allowing DAS to occur being advantageous when pollinators are absent, while reduced floral longevity and prevention of DAS being favored when flowers are pollinated by pollinators. Thus, flower longevity in S. umbratica varies so as to optimize reproductive output and resource efforts, and is dependent on the availability and effectiveness of pollinators to pollinate flowers.
关键词	delayed self-pollination pollen-limitation recurving styles seed set Salvia Lamiaceae floral longevity resource use STAMINAL LEVER MECHANISM KOSTELETZKYA-VIRGINICA INBREEDING DEPRESSION POLLINATION BIOLOGY POLLEN LIMITATION SENECIO-VULGARIS L. LAMIACEAE FERTILIZATION DICHOGAMY CURVATURE
DOI	10.3389/fpls.2021.635310
WOS记录号	WOS:000683062000001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73222
专题	中国科学院昆明植物研究所
作者单位	1.[Xiao, Han-Wen 2.Huang, Yan-Bo 3.Chen, Yun 4.Shanghai Chenshan Bot Garden, Shanghai, Peoples R China 5.Eastern China Conservat Ctr Wild Endangered Plant, Shanghai, Peoples R China 6.[Chang, Yu-Hang 7.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Integrat Conservat Plant Species E, Kunming, Yunnan, Peoples R China 8.[Abbott, Richard J.] Univ St Andrews, Sch Biol, St Andrews, Fife, Scotland
推荐引用方式 GB/T 7714	Xiao,Han-Wen,Huang,Yan-Bo,Chang,Yu-Hang,et al. Occurrence and Prevention of Delayed Autonomous Selfing in Salvia umbratica (Lamiaceae)[J]. FRONTIERS IN PLANT SCIENCE,2021,12:635310.
APA	Xiao,Han-Wen.,Huang,Yan-Bo.,Chang,Yu-Hang.,Chen,Yun.,Abbott,Richard J..,...&Ma,Yong-Peng.(2021).Occurrence and Prevention of Delayed Autonomous Selfing in Salvia umbratica (Lamiaceae).FRONTIERS IN PLANT SCIENCE,12,635310.
MLA	Xiao,Han-Wen,et al."Occurrence and Prevention of Delayed Autonomous Selfing in Salvia umbratica (Lamiaceae)".FRONTIERS IN PLANT SCIENCE 12(2021):635310.