Salinity Stress Alters Root Morphology and Root Hair Traits in Brassica napus
Salinity Stress Alters Root Morphology and Root Hair Traits in Brassica napus
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DOI：
10.3390/plants8070192
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发表时间：
2019-07-01
期刊：
影响因子：
4.5
通讯作者：
Robin, Arif Hasan Khan
中科院分区：
文献类型：
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作者：
Arif, Mohammad Rashid;Islam, M. Thoihidul;Robin, Arif Hasan Khan
植物根系表现出形态可塑性，在耐受各种土壤胁迫中起着重要作用。本研究旨在探讨两个油菜品种Bari Sarisha-8和Binasarisha-5在生殖阶段对盐分诱导的根部性状和根毛的形态发生反应及其对生殖生长的影响。这项实验是在水培条件下进行的。萌发后55d，分别设置0 mM和100 mM两个处理。与对照相比，暴露于100 mM NaC l 7天的植株在叶片、花和角果中受到的伤害更大。1级和3级侧根上的根毛长度、1级侧根上的根毛密度和3级侧根的长度分别比对照增加了91%、22%、29%和48%。在盐胁迫条件下，估计根表面积增加了20%，这表明植物对吸收更多水分和养分的自发反应使植物能够应对胁迫条件。这项研究的结果表明，未来的逆境育种计划应该集中考虑根系性状的可塑性。
Plant roots show morphological plasticity and play a substantial role in tolerance to various edaphic stresses. The aim of this study was to explore salinity-induced morphogenic responses of root traits and root hairs of two rapeseed varieties, BARI Sarisha-8 and Binasarisha-5, at the reproductive stage and perceive the effects on their reproductive growth. The experiment was conducted in a hydroponic culture. Two treatments, 0 mM NaCl as control and 100 mM NaCl, were imposed 55 d after germination. Plants exposed to 100 mM NaCl for seven days displayed greater damage in the leaves, flowers, and siliquae compared to control. Length of root hairs on first-order and third-order lateral roots, density of root hairs on first-order lateral roots, and length of third-order lateral roots were significantly greater by 91%, 22%, 29%, and 48%, respectively, in the treated condition compared to the control. An increase in estimated root surface area by 20% under salt stress conditions indicated that the spontaneous responses of plants to uptake more water and nutrients allowed a plant to cope with stressful conditions. The results of this study suggest that any future stress breeding programs should consider plasticity of root traits intensively.