ABSTRACT Pomegranate (Punica granatum L.) is one of the most important Iranian horticultural products, which is usually cultivated in arid and semi-arid regions. Climate change has led to drought stress and it’s a threat to the agricultural products as well as pomegranate. This experiment was conducted on two-year-old rooted pomegranates of eight commercial cultivars namely ‘Malase Saveh’ (‘M-Saveh’), ‘Malase Isfahan’ (‘M-Isfahan’), ‘Robabe Ghermeze Shiraz’ (‘Robab’), ‘Gabrie Yazd’ (‘G-Yazd’), Gabrie Torshe Yazd’ (‘GT-Yazd’), ‘Zaghe Sefide Yazd’ (‘ZS-Yazd’), ‘Zaghe Torshe Yazd’ (‘ZT-Yazd’) and ‘Malase Torshe Pishva’ (‘M-Pishva’). Irrigation treatments were 50% of maximum allowable deficiency (without stress) and 80% of maximum allowable deficiency (stress). This research carried out as a factorial experiment based on randomized complete block design. Increased proline content was variable in pomegranate cultivars exposed to stress, so that, the highest increase was observed in the ‘M-Saveh’ with a 20.27% increase compared to the control treatment. ‘Robab’ showed the lowest increase in proline content. The highest increase in superoxide dismutase and peroxidase activity was 8.49 and 16.84%, respectively, in ‘ZS-Yazd’. The activity of superoxide dismutase in ‘Robab’, which was exposed to drought stress, decreased. This cultivar showed the highest electrolyte leakage with an average of 83.58%. The lowest electrolyte leakage was belonged to ‘ZS-Yazd’ (24.1%), and then ‘GT-Yazd’ (18.66%). Cluster analysis divided the genotypes into four main groups. ‘ZS-Yazd’ and ‘M-Saveh’ were in the same group. These two cultivars were more tolerant to drought stress than other cultivars in the physiological aspects.

中文翻译：

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不同石榴（Punica Granatum L.）品种在干旱胁迫下的一些生理反应筛选耐旱性的研究

摘要 石榴（Punica granatum L.）是伊朗最重要的园艺产品之一，通常在干旱和半干旱地区种植。气候变化导致干旱压力，对农产品和石榴构成威胁。该实验是在 8 个商业品种的两年生根石榴上进行的，即“Malase Saveh”（“M-Saveh”）、“Malase Isfahan”（“M-Isfahan”）、“Robabe Ghermeze Shiraz”（“Robab”） ), '加布里亚兹德' ('G-亚兹德'), 加布里·托什亚兹德' ('GT-亚兹德'), '扎格·塞菲德·亚兹德' ('ZS-亚兹德'), '扎格·托什·亚兹德' ('ZT-亚兹德') ) 和 'Malase Torshe Pishva' ('M-Pishva')。灌溉处理为最大允许缺量（无胁迫）的 50% 和最大允许缺量（胁迫）的 80%。本研究作为基于随机完全区组设计的析因实验进行。暴露于压力的石榴品种中脯氨酸含量的增加是可变的，因此，与对照处理相比，在“M-Saveh”中观察到的增加幅度最大，增加了 20.27%。'Robab' 的脯氨酸含量增加最少。在“ZS-Yazd”中，超氧化物歧化酶和过氧化物酶活性的最高增幅分别为 8.49% 和 16.84%。'Robab' 在干旱胁迫下的超氧化物歧化酶活性降低。该品种的电解质泄漏率最高，平均为 83.58%。电解液泄漏最低的是“ZS-Yazd”（24.1%），然后是“GT-Yazd”（18.66%）。聚类分析将基因型分为四个主要组。“ZS-Yazd”和“M-Saveh”在同一组中。