Cross-tolerance Physiology of Chickpea (Cicer arietinum L.) Genotypes under Combined Salinity and High Temperature Stress Condition

IF 0.8 4区 生物学 Q3 AGRONOMY Legume Research Pub Date : 2020-12-03 DOI:10.18805/lr-4390
Trisha Sinha, A. Singh, Shailesh Kumar
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引用次数: 1

Abstract

Background: Chickpea at seedling stage is highly sensitive to salinity and high temperature stress. Many studies explained plant responses under independent salinity and high temperature stress, but very little findings had revealed the combined effects of these two stresses on plants. So, the present experiment was aimed to study the response of chickpea genotypes for growth parameters and stress tolerance indices at seedling stage under individual and combined salinity and high temperature stress.Methods: A laboratory experiment during rabi season of 2018-2019 was conducted with thirty chickpea genotypes by comparing their responses under different salinity stresses i.e. EC 4.0 dSm-1 and 8.0 dSm-1 and high temperature (37°C). Seedling growth parameters i.e. germination percentage, vigour index and seedling dry weight along with stress tolerance indices like yield stability index and tolerance index were measured for 10-day-old seedlings.Result: The results revealed genotypic variations for all the parameters, based on which the genotypes KPG-59, IPC 2013-74 and NDG 15-6 were identified as tolerant, whereas KWR-108, BG-3075 and BG-3076 as susceptible. Interestingly, the results also showed that the tolerant genotypes exhibited maximum cross-tolerance at highest level of stress (T5) for germination percentage and vigour index, over control (T0), which might be attributed to their acclimatization while facing different stresses during early growth. So, the genotypic variations in chickpea for these parameters at germination stage might be good criteria for selection of tolerant genotypes under salinity and high temperature individually and also when combined.
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鹰嘴豆的交叉耐受生理盐高温联合胁迫条件下的基因型
背景:鹰嘴豆苗期对盐胁迫和高温胁迫高度敏感。许多研究解释了植物在盐度和高温胁迫下的反应,但很少有研究揭示了这两种胁迫对植物的综合影响。因此,本试验旨在研究鹰嘴豆基因型在单独和联合盐高温胁迫下对苗期生长参数和耐胁迫指标的响应。方法:在2018-2019年rabi季,采用30个鹰嘴豆基因型进行室内试验,比较不同盐度胁迫(EC 4.0 dSm-1和8.0 dSm-1)和高温(37°C)下鹰嘴豆基因型的反应。测定了10日龄幼苗的发芽率、活力指数和干重等生长参数,以及产量稳定指数和耐受性指数等抗逆性指标。结果:各指标均存在基因型差异,其中KPG-59、IPC 2013-74和NDG 15-6为耐受性基因型,KWR-108、BG-3075和BG-3076为易感基因型。耐受性基因型在最高胁迫水平(T5)下对发芽率和活力指数表现出最大的交叉耐受性,高于对照(T0),这可能与它们在生长早期面对不同胁迫时的驯化有关。因此,鹰嘴豆在萌发期这些参数的基因型变异可以作为选择耐盐和耐高温基因型的良好标准。
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来源期刊
Legume Research
Legume Research AGRONOMY-
CiteScore
1.30
自引率
37.50%
发文量
256
审稿时长
6-12 weeks
期刊介绍: Legume Research An International Journal. The Journal is an official publication of Agricultural Research Communication Centre. It is designed to bring out the original research articles on genetics, breeding, physiology, bacterial avtivity, production, quality, biochemistry and seeds of legumes crops. The objective of the journal is to serve as a forum for scientific community to publish their research findings on legumes ans to provide basis for new research. Journal is being scanned in the important indexing and abstracting services.
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