茜草科植物胚胎和种子休眠的多样性:分类/系统发育和生物地理学的视角

IF 2.1 3区 生物学 Q2 PLANT SCIENCES
Carol C. Baskin, Jerry M. Baskin
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引用次数: 0

摘要

本文从生态学、生命形态、生物地理学和系统发育(亚科/部落)等方面综述了被子植物科第四大植物Rubiaceae的种子休眠和萌发。生命形式包括树木、灌木、藤蔓和草本植物,热带雨林的树木拥有最多的部落和物种。该科有五种胚:投入胚、线性饱满胚、线性欠发达胚、匙形胚和匙形欠发达胚,种子为非休眠(ND)或形态(MD)、形态生理(MPD)或生理(PD)休眠。除了双瓣花总科干果中才有着床胚外,双瓣花总科干果和肉质果中都有着床胚。在热带和温带地区,既有ND种子,也有MD、MPD或PD种子。热带雨林乔灌木和半常绿雨林灌木具有完整的种子休眠特征(即一些种子具有ND,另一些种子具有MD、MPD或PD)。休眠中断发生在寒冷或温暖的分层或干燥后成熟,这取决于物种。一些热带植物的休眠/发芽期较长,可达4-5至30-40周。在热带和温带地区,分别有5个和15个rubbiaceae部落存在土壤种子库。随着离赤道距离的增加,生命形式的多样性和种子休眠减少,导致只有高纬度地区的草本植物具有PD。结果表明,温带地区茜草科植物物种丰富度低与种子休眠/萌发多样性低无关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diversity of embryos and seed dormancy in Rubiaceae: a taxonomic/phylogenetic and biogeographic perspective

We have reviewed seed dormancy and germination in the Rubiaceae, the fourth-largest angiosperm family (in terms of species richness), in relation to ecology, life form, biogeography and phylogeny (subfamily/tribe). Life forms include trees, shrubs, vines and herbs, and tropical rainforest trees have the greatest number of tribes and species. The family has five kinds of embryos: investing, linear-full, linear-underdeveloped, spatulate and spatulate-underdeveloped, and seeds are non-dormant (ND) or have morphological (MD), morphophysiological (MPD) or physiological (PD) dormancy. Except for the occurrence of the investing embryo only in dry fruits of Dialypetalanthoideae, each kind of embryo is found in dry and fleshy fruits of Dialypetalanthodies and of Rubioideae. In tropical and temperate regions, there are species with ND seeds and others whose seeds have MD, MPD or PD. A complete seed dormancy profile (i.e. some species with ND seeds and others whose seeds have MD, MPD or PD) was found for tropical rainforest trees and shrubs and semi-evergreen rainforest shrubs. Dormancy-break occurs during cold or warm stratification or dry-afterripening, depending on the species. Some tropical species have long periods of dormancy-break/germination extending for 4–5 to 30–40 weeks. Soil seed banks are found in 5 and 15 tribes of Rubiaceae in tropical and temperate regions, respectively. With increased distance from the Equator, diversity of life forms and seed dormancy decreases, resulting in only herbs with PD at high latitudes. We conclude that the low species richness of Rubiaceae in temperate regions is not related to low diversity of seed dormancy/germination.

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来源期刊
Seed Science Research
Seed Science Research 生物-植物科学
CiteScore
3.60
自引率
4.80%
发文量
23
审稿时长
>12 weeks
期刊介绍: Seed Science Research, the official journal of the International Society for Seed Science, is a leading international journal featuring high-quality original papers and review articles on the fundamental aspects of seed science, reviewed by internationally distinguished editors. The emphasis is on the physiology, biochemistry, molecular biology and ecology of seeds.
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