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富士苹果SDRs家族基因MdSDR的克隆及序列分析 被引量:2
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作者 龚婉 吕路琼 +1 位作者 王维东 黄丽丽 《分子植物育种》 CAS CSCD 北大核心 2020年第14期4597-4604,共8页
本研究以富士苹果(Malus domestica cv. Fuji)为材料,提取总RNA并反转获得的cDNA为模板,利用PCR技术获得苹果短链脱氢酶/还原酶家族基因MdSDR序列,并结合生物信息学方法对MdSDR蛋白序列进行分析。结果显示,苹果MdSDR序列全长804 bp,编码... 本研究以富士苹果(Malus domestica cv. Fuji)为材料,提取总RNA并反转获得的cDNA为模板,利用PCR技术获得苹果短链脱氢酶/还原酶家族基因MdSDR序列,并结合生物信息学方法对MdSDR蛋白序列进行分析。结果显示,苹果MdSDR序列全长804 bp,编码267个氨基酸,分子质量约27.83 kD,等电点为7.69,是一种稳定的疏水蛋白。比对分析发现其编码蛋白氨基酸序列与已选序列中的碧桃、樱花相似性最高,分别达77.78%和77.69%,进化分析结果也表明MdSDR蛋白与碧桃和樱花亲缘关系较近。亚细胞定位结果显示该蛋白主要位于细胞质中。多序列比对分析显示该蛋白含有SDR家族特有的两个保守结构域:GxxxGxG与YxxxK。二级结构中β片层、α螺旋、无规则卷曲结构分别占比12.73%、39.70%、47.57%,并含有典型的βαβ单元。三级结构预测结果表明该蛋白具有典型的Rossman折叠结构域。本研究结果为了解苹果中SDRs蛋白的功能、探讨其在苹果抗逆中的作用、培育苹果抗逆种质资源提供了思路。 展开更多
关键词 富士苹果(malus domestica cv.fuji) 短链脱氢酶/还原酶 基因克隆 序列分析
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Flavonols Induced by 5-Aminolevulinic Acid Are Involved in Regulation of Stomatal Opening in Apple Leaves 被引量:5
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作者 LIU Longbo XIONG Lijun +2 位作者 AN Yuyan ZHENG Jie WANG Liangju 《Horticultural Plant Journal》 SCIE 2016年第6期323-330,共8页
Flavonols, the main flavonoids in plant leaves, have newly been proposed as a H2O2 scavenger in guard cells. However, whether 5-aminolevulinic acid(5-ALA) is involved in regulating stomatal movement of apple(Malus ... Flavonols, the main flavonoids in plant leaves, have newly been proposed as a H2O2 scavenger in guard cells. However, whether 5-aminolevulinic acid(5-ALA) is involved in regulating stomatal movement of apple(Malus × domestica Borkh. ‘Fuji') leaves through flavonol accumulation remains unclear. In this study, using diphenylboric acid 2-amino ethyl ester(DPBA, a flavonol fluorescent dye) and a laser scanning confocal microscope,we observed that 5-ALA pretreatment significantly improved flavonol accumulation in guard cells of apple leaves, especially around the nucleus.Then we demonstrated that 5-ALA pretreatment inhibited ABA-induced stomatal closure via decreasing reaction oxygen species(ROS) accumulation in guard cells. Pretreatment with quercetin or kaempferol, two main kinds of flavonols in plants, also inhibited ABA-induced stomatal closure by decreasing ROS content in the guard cells. Furthermore, exogenous flavonols could suppress H2O2-induced stomatal closure in apple leaves.Taken together, we conclude that ALA-induced flavonol accumulation in guard cells is involved in the inhibitory effect of ALA on ABA-induced ROS accumulation and stomatal closure in apple leaves. 展开更多
关键词 apple(malus × domestica Borkh.‘fuji’) ABA 5-ALA FLAVONOLS stomatal aperture guard cell
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