Seed Heteromorphism: An Important Adaptation of Halophytes for Habitat Heterogeneity.
Seed Heteromorphism: An Important Adaptation of Halophytes for Habitat Heterogeneity.
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DOI：
10.3389/fpls.2018.01515
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发表时间：
2018
影响因子：
5.6
通讯作者：
Song J
中科院分区：
文献类型：
--
作者：
Liu R;Wang L;Tanveer M;Song J
种子萌发是盐碱环境下幼苗建立的一个非常关键和重要的步骤，因为土壤中的高盐分会阻止种子萌发。然而，盐生植物表现出一种有趣的机制来科普盐胁迫。许多盐生植物产生异形种子，这些种子在盐条件下具有不同的休眠和萌发行为。这一特点与异形种子的结构和生理差异有关。目前还不清楚，异形种子在盐条件下如何不同地积累有机和无机物质，以及异形种子产生的生理和分子机制，以及异形种子跨代可塑性的发展。本文对休眠和萌发以及种皮和贮藏物质在异形种子发育过程中可能发挥的作用进行了讨论。此外，母体效应对盐环境下异型种子产生及其后代生长繁殖能力的作用也得到了重视。
Seed germination is a very critical and important step for seedling establishment under saline environments, as high level of salinity in the soil can prevent seed germination. However halophytes exhibit an interesting mechanism to cope with salt stress. Many halophytes produce heteromorphic seeds, which have different dormancy and germination behavior under saline conditions. This characteristic is related to the structural and physiological differences among heteromorphic seeds. It was unclear that how heteromorphic seeds differently accumulate organic and inorganic substances under saline conditions, and what are the physiological and molecular mechanisms involved in the production of heteromorphic seeds, and in the development of transgenerational plasticity in heteromorphic seeds. In the current brief review, dormancy and germination and the possible role of seed coat and storage compounds in this process of heteromorphic seeds development have been discussed. Moreover, the role of maternal effects on heteromorphic seeds production under saline environments and growth and reproduction capability of the descendants from them have been highlighted.
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