Biochemical and gene expression profiling of five pear species under drought stress conditions.

IF 4.3 2区 生物学 Q1 PLANT SCIENCES
Lavin Babaei, M Mehdi Sharifani, Reza Darvishzadeh, Naser Abbaspour, Mashhid Henareh
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Abstract

Drought is one of the crucial abiotic stresses which affects growth, development, and performance of pear trees. This research was performed to investigate responses of five pear species including Pyrus communis L., Pyrus boissieriana Bushe., Pyrus glabra Boiss., Pyrus syriaca Boiss., and Pyrus salicifolia Pall. to different levels of drought stress. The potted trees were irrigated with water volume of 100%, 60%, or 30% of field capacity (FC) during 90 days. Based on the visual observation, the plant growth was restricted by severe drought in all species. Malondialdehyde (MDA) and glycine betaine (GB) contents, as well as the ascorbate peroxidase (APX), guaiacol peroxidase (GPX) and catalase (CAT) activities were indicated an uprising behavior under drought stress. Principal component analysis (PCA) analysis revealed P. glabra as tolerant and P. communis as sensitive to drought stress. The expression rates of stress-responsive transcription factors (TFs); WRKY29 and DREB6 and their responding genes, including LEA29 and Dehydrin1, were analyzed in the two differentially drought-responding pear species i.e., P. glabra and P. communis. The expression of the studied TFs was induced when both species were exposed to higher drought levels. The species P. glabra exhibited better osmoregulation, antioxidant response, and higher up-regulation of WRKY29, DREB6, LEA29 and Dehydrin1. In conclusion, among the studied pear species, P. glabra could best tolerate drought stress by boosting protective mechanisms.

干旱胁迫条件下5种梨的生化及基因表达谱分析
干旱是影响梨树生长发育和生产性能的重要非生物胁迫之一。以梨(Pyrus communis L.)、梨(Pyrus boissieriana Bushe)等5种梨为研究对象,研究了其对水分胁迫的响应。,山梨。Pyrus syriaca Boiss。和水杨桃。不同程度的干旱压力。盆栽树木在90天内分别用田间容量的100%、60%和30%进行灌溉。目测结果表明,所有树种的生长均受到严重干旱的制约。丙二醛(MDA)和甘氨酸甜菜碱(GB)含量以及抗坏血酸过氧化物酶(APX)、愈创木酚过氧化物酶(GPX)和过氧化氢酶(CAT)活性在干旱胁迫下呈上升趋势。主成分分析(PCA)结果表明,光草对干旱胁迫表现出较强的耐受性,而社区草对干旱胁迫表现出较强的敏感性。应激反应转录因子(TFs)的表达率;对两种不同干旱响应的梨品种光梨(P. glabra)和社区梨(P. communis) WRKY29和DREB6及其响应基因LEA29和Dehydrin1进行了分析。当两种植物暴露于较高的干旱水平时,所研究的TFs的表达都被诱导。光叶青具有较好的渗透调节和抗氧化反应,WRKY29、DREB6、LEA29和Dehydrin1表达上调较高。综上所述,在所研究的梨种中,光斑梨通过增强保护机制来适应干旱胁迫的能力最强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
BMC Plant Biology
BMC Plant Biology 生物-植物科学
CiteScore
8.40
自引率
3.80%
发文量
539
审稿时长
3.8 months
期刊介绍: BMC Plant Biology is an open access, peer-reviewed journal that considers articles on all aspects of plant biology, including molecular, cellular, tissue, organ and whole organism research.
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