干旱区生态环境知识资源中心(Arid): Intraspecific Seasonal Variation of Flowering Synchronization in a Heterodichogamous Tree

Arid

DOI	10.3390/plants9111509
	Intraspecific Seasonal Variation of Flowering Synchronization in a Heterodichogamous Tree
	Tel-Zur, Noemi; Keasar, Tamar
通讯作者	Keasar, T
来源期刊	PLANTS-BASEL
EISSN	2223-7747
出版年	2020
卷号	9 期号:11
英文摘要	Heterodichogamous reproduction in plants involves two flowering morphs, reciprocal in their timing of male and female sexual functions. The degree of synchrony in floral sex phase, within and between individuals of each morph, determines the flowers' potential fertilization partners. Complete within-morph synchrony enables across-morph mating alone, whereas unsynchronized floral sex phases may allow fertilization within a plant individual (geitonogamy) or within a morph. We documented the disruption of flowering synchrony in the heterodichogamous Ziziphus spina-christi towards the end of its seven-month flowering season. This desert tree has self-incompatible, protandrous, short-lived (2-day) flowers that open before dawn ('Early' morph) or around noon ('Late' morph). We counted flowers in the male and female phase on flowering branches that were sampled monthly during the 2016-2018 flowering seasons. In 2018, we also tagged flowers and followed their sex-phase distributions over two days at the start, middle, and end of the season. The switch to the female phase was delayed at the end-season (November-December), and 74% of the flowers did not develop beyond their male phase. Differences in male-phase duration resulted in asynchrony among flowers within each tree and among trees of both flowering morphs. Consequently, fertilization between trees of the same morph becomes potentially possible during the end-season. In controlled hand-pollination assays, some within-morph fertilizations set fruit. The end-season breakdown of synchronous flowering generates variability within morphs and populations. We suggest that this variability may potentially enable new mating combinations in a population and enhance its genetic diversity.
英文关键词	dichogamy flowering rhythm phenotypic plasticity synchrony disruption Ziziphus spina-christi
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000593796200001
WOS关键词	SELF-INCOMPATIBILITY ; POLLINATION ; DICHOGAMY ; POLLEN ; PHENOLOGY ; PATTERNS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327725
作者单位	[Tel-Zur, Noemi] Ben Gurion Univ Negev, J Blaustein Inst Desert Res, French Associates Inst Agr & Biotechnol Drylands, Sde Boqer Campus, IL-8499000 Sede Boqer, Israel; [Keasar, Tamar] Univ Haifa, Dept Biol, IL-36006 Tivon, Israel
推荐引用方式 GB/T 7714	Tel-Zur, Noemi,Keasar, Tamar. Intraspecific Seasonal Variation of Flowering Synchronization in a Heterodichogamous Tree[J]. Ben-Gurion University of the Negev,2020,9(11).
APA	Tel-Zur, Noemi,&Keasar, Tamar.(2020).Intraspecific Seasonal Variation of Flowering Synchronization in a Heterodichogamous Tree.PLANTS-BASEL,9(11).
MLA	Tel-Zur, Noemi,et al."Intraspecific Seasonal Variation of Flowering Synchronization in a Heterodichogamous Tree".PLANTS-BASEL 9.11(2020).