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现代生命科学研究

Journal of Modern Life Sciences Research

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Journal of Modern Life Sciences Research. 2020; 1: (1) ; 10.12208/j.jlsr.20200003 .

Evaluation of heat tolerance potential in Capsicum annum L. genotypes under heat stress
热胁迫下辣椒基因型耐热潜力的评价

作者: Mujahid Ali *, Muhammad Imran Lodhi, Choudhary Muhammad Ayyub, Zahoor Hussain, Zaid Mustafa, Tehseen Ashraf, Bilal Akram, Saqib Ayyub

萨戈达大学农业学院园艺系

农业大学园艺科学研究所

阿拉马·伊克巴尔公开大学农业部

*通讯作者: Mujahid Ali,单位:萨戈达大学农业学院园艺系;

引用本文: Mujahid Ali, Muhammad Imran Lodhi, Choudhary Muhammad Ayyub, Zahoor Hussain, Zaid Mustafa, Tehseen Ashraf, Bilal Akram, Saqib Ayyub 热胁迫下辣椒基因型耐热潜力的评价[J]. 现代生命科学研究, 2020; 1: (1) : 14-20.
Published: 2020/6/17 11:32:23

摘要

夏季蔬菜受到高于阈值水平的高温的严重影响,最终导致其生产的严重损失。为了应对这些经济损失,已采取了不同的策略。本研究旨在筛选出灯笼椒的耐热基因型。为此,在费萨拉巴德农业大学园艺科学研究所的植物生长室进行了实验。从Ayub农业研究所Faisalabad(AARI)引进了10个基因型的灯笼椒(C1G3,C3G5,C7G4,V6G4,C2-E,C5G4,C43-D,C4G3,C43-A,C2G3)并进行了种植。进行了高达40°C的热处理。收集有关农艺性状(叶片数,根长,枝长,幼苗干重,幼苗鲜重,电解质渗漏)和生理学(气孔导度,光合速率,蒸腾速率和水分利用效率)的数据。适当的统计设计用于分析数据。研究结果证明,热应激显着影响筛选基因型的生理,形态和机制,这些基因型遵循热应激的顺序为C5G4,C1G3,C2G3,C43-A,C3G5,C43-D,V6G4,C4G3,C43-A和C2G3。在高温胁迫下所有这些变化的共同作用导致植物生长和生产力差。根据生理和生理参数,基因型C5G4,C1G3和C43-A是耐受性最高和耐药性最高的基因型。

关键词: 热应激;青椒;基因型;生理;筛选

Abstract

Summer vegetables are severely affected by high temperature above threshold level which ultimately results in serious losses of their production. To cope with these economic losses different strategies had been adopted. The present study was designed to screen out heat tolerant genotypes of bell pepper. For this purpose, experiment was conducted in plant growth room in Institute of Horticultural Sciences, University of Agriculture Faisalabad. Ten genotypes of bell pepper (C1G3, C3G5, C7G4, V6G4, C2-E, C5G4, C43-D, C4G3, C43-A, C2G3) were brought from Ayub Agriculture Research Institute Faisalabad (AARI) and were grown. Heat treatment up to 40 ̊C was given. Data regarding agronomic traits (number of leaves, root length, shoot length, seedling dry weight, seedling fresh weight, electrolyte leakage) and physiological (Stomatal conductance, photosynthetic rate, transpiration rate and water use efficiency) was collected. Proper statistical designs were used to analyze the data. The research findings proved that heat stress significantly affected physiology, morphology and mechanisms of screened genotypes which followed the order for the heat stress as C5G4, C1G3, C2G3, C43-A, C3G5, C43-D, V6G4, C4G3, C43-A and C2G3, respectively. The collective effects of all these changes under high temperature stress resulted in poor plant growth and productivity. On the basis of physical and physiological parameters, genotypes C5G4, C1G3 and C43-A were among the most tolerant group and the most resistant genotypes.

Key words: Heat Stress; Bell Pepper; Genotypes; Physiology; Screening

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