收稿日期: 2021-03-25
录用日期: 2021-06-18
网络出版日期: 2021-06-18
基金资助
国家自然科学基金(31802122);研究生创新型科研项目(CX2020SZ20)
Research Progress on Apoplast Barriers of Plant Roots
Received date: 2021-03-25
Accepted date: 2021-06-18
Online published: 2021-06-18
根是植物吸收水分和矿质营养以维持生命活动的重要器官。根系的构型和超微结构具有物种特异性, 对水分和矿质营养的吸收有不同程度的影响。其中, 内、外皮层的木栓层和凯氏带是2种重要的质外体屏障, 可非定向地阻断水分和离子运输, 在植物生长发育及响应逆境胁迫中发挥重要作用。尽管如此, 植物根系质外体屏障的结构、化学组成、生理功能、生物合成及其调控仅在模式植物拟南芥(Arabidopsis thaliana)中被广泛研究。近年来, 关于作物大麦(Hordeum vulgare)、水稻(Oryza sativa)以及部分牧草的根系质外体屏障研究报道逐渐增多。该文系统比较了拟南芥、大麦、水稻以及部分牧草根系质外体屏障的异同, 提出今后的研究方向, 以期为深入探索禾本科作物和牧草根系质外体屏障在生长发育和逆境适应中的作用奠定理论基础, 并为作物和牧草育种工作提供新思路。
刘鑫, 王沛, 周青平 . 植物根系质外体屏障研究进展[J]. 植物学报, 2021 , 56(6) : 761 -773 . DOI: 10.11983/CBB21054
Root is the most important organ of plants to absorb water and mineral nutrients for maintaining life activities. The architecture and ultrastructure of roots are species specific with different effects on the water and mineral nutrients absorption. Among them, suberin lamellae and Casparian strip in the endodermis and exodermis are two important apoplast barriers, which block water and ions transport nondirectionally and play important roles in the plant growth and response to stress. However, the structure, chemical composition, physiological functions, biosynthesis and regulation of root apoplast barriers are only studied in Arabidopsis thaliana. In recent years, studies of root apoplast barriers in barley (Hordeum vulgare), rice (Oryza sativa) and some forages have just been reported. In this review, the research progress of root apoplast barriers in A. thaliana, barley, rice and some forages in recent years are compared, and the future research direction is put forward in order to provide a theoretical basis for further exploring the roles of apoplastic barriers of gramineous crops and forages in growth, development and stress adaptation, and provide new ideas for crop and forage breeding.
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