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Impact of potassium deficiency on cotton growth, development and potential microRNA-mediated mechanism.
Plant Physiology and Biochemistry ( IF 6.5 ) Pub Date : 2020-05-25 , DOI: 10.1016/j.plaphy.2020.05.006
Julia Elise Fontana 1 , Guo Wang 2 , Runrun Sun 2 , Huiyun Xue 2 , Qian Li 2 , Jia Liu 2 , Kyle E Davis 1 , Thomas Elliott Thornburg 1 , Baohong Zhang 3 , Zhiyong Zhang 2 , Xiaoping Pan 3
Affiliation  

The goal of this study was to investigate the impact of potassium deficiency on cotton seedling growth and development at the individual, physiological, biochemical, and molecular levels. Potassium is an important plant nutrient; our results show that potassium deficiency significantly affected cotton seedling growth and development, evidenced by reduced plant height, and total areas of the leaves and roots as well as further reduced both fresh and dry biomass of the entire plants. Potassium deficiency also significantly inhibited root and leaf respiration and leaf photosynthesis. Compared with the controls, potassium deficiency significantly inhibited root elongation and total root surface areas that further inhibited cotton seedlings to uptake nutrients from the medium. Potassium deficiency induced aberrant expression of both microRNAs (miRNAs) and their protein-coding targets. These miRNAs regulate plant root development as well as response to abiotic stresses. Potassium deficiency altered the expression of miRNAs that regulate the expression of protein-coding genes controlling root development and response to potassium deficiency. miRNAs regulate root development and further control plant development in cotton seedlings under potassium deficiency. In summary, potassium deficiency significantly affected the cotton seedling photosynthesis and respiration that resulted in inhibition of cotton seedling growth and development potentially due to the miRNA-mediated mechanism.



中文翻译:

钾缺乏对棉花生长,发育和潜在的microRNA介导机制的影响。

这项研究的目的是在个体,生理,生化和分子水平上研究缺钾对棉花幼苗生长发育的影响。钾是一种重要的植物营养素。我们的结果表明,钾缺乏严重影响棉花幼苗的生长和发育,这可以通过降低株高,叶和根的总面积以及进一步降低整株植物的新鲜和干燥生物量来证明。钾缺乏还显着抑制根和叶的呼吸以及叶的光合作用。与对照相比,钾缺乏显着抑制根伸长和总根表面积,从而进一步抑制棉花幼苗从培养基中吸收养分。钾缺乏会引起microRNA(miRNA)及其蛋白编码靶标的异常表达。这些miRNA调节植物根的发育以及对非生物胁迫的响应。钾缺乏症改变了miRNA的表达,该miRNA调控着控制根发育和对钾缺乏症反应的蛋白质编码基因的表达。缺钾条件下,miRNA调节棉花幼苗的根系发育并进一步控制植物的发育。总之,缺钾会显着影响棉花幼苗的光合作用和呼吸作用,这可能是由于miRNA介导的机制导致棉花幼苗生长和发育受到抑制。钾缺乏症改变了miRNA的表达,miRNAs调控着控制根发育和对钾缺乏症的反应的蛋白质编码基因的表达。缺钾条件下,miRNA调节棉花幼苗的根系发育并进一步控制植物的发育。总之,钾缺乏显着影响棉花幼苗的光合作用和呼吸作用,这可能是由于miRNA介导的机制导致棉花幼苗生长和发育受到抑制。钾缺乏症改变了miRNA的表达,该miRNA调控着控制根发育和对钾缺乏症反应的蛋白质编码基因的表达。缺钾条件下,miRNA调节棉花幼苗的根系发育并进一步控制植物的发育。总之,钾缺乏显着影响棉花幼苗的光合作用和呼吸作用,这可能是由于miRNA介导的机制导致棉花幼苗生长和发育受到抑制。

更新日期:2020-05-25
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