Responses of the Anthocyanin and Osmolyte Contents of the Capsicum annuum Cultivars Planted in Wenshan Prefecture of Yunnan Province to the Drought Stress Simulated by PEG-6000

云南文山辣椒花色苷和渗透调节物含量对PEG-6000模拟干旱胁迫的响应（英文）

[Objective] The aim of this study was to compare the drought resistance difference of the main Capsicum annuum cultivars planted in Wenshan Prefecture of Yunnan Province. [Method] The total anthocyanin, soluble sugar, soluble protein and free proline contents of the leaves of the five main C. annuum cultivars planted in Wenshan Prefecture, i.e., ZSZ75-1, ZSZ49-1-1, 12WS-18-1, 12ZH01 and ZS130, under the drought stress simulated by PEG-6000 were studied by using spectrophotometry, and the total osmoregulation abilities of the leaves were evaluated by using subordinate function. [Result] Under the drought stress simulated by PEG-6000, the total anthocyanin contents of the veins, mesophylls and whole leaves of the five cultivars were all as： ZSZ75-1〉ZSZ49-1-1〉12WS-18-1〉12ZH01〉ZS130, the soluble sugar contents as： 12ZH01 〉12WS-18-1 〉ZS130〉ZSZ49-1-1 〉ZSZ75-1, the soluble protein contents as： ZSZ75-1〉12ZH01〉ZSZ49-1-1〉12WS-18-1〉ZS130, and the free proline contents as： ZS130〉ZSZ75-1 〉12WS-18-1 〉ZSZ49-1-1 〉12ZH01. Furthermore, the differences among the total anthocyanin contents of the veins, mesophylls and whole leaves of the five cultivars all reached the extremely significant levels, whereas the differences among the contents of the soluble sugar, soluble protein and free proline did not reach the significant levels, the correlation degrees among the contents of the total anthocyanin, soluble sugar, soluble protein and free proline of different cultivars were also inconsistent, and the total osmoregulation abilities of the five cultivar leaves were as： ZSZ75-1 〉7SZ49-1-1 〉12WS-18-1 〉ZS130〉12ZH01. [Conclusion] The anthocyanin accumulation in the specific organs of the five C. annuum cultivars in Wenshan Prefecture is beneficial to the strengthening of the leaf osmoregulation abilities under drought stress, favoring the drought tolerance of the cultivars.

[目的]比较云南省文山州辣椒主栽品种抗旱性的差异。[方法]用分光光度法研究了云南文山州辣椒主栽品种ZSZ75-1、ZSZ49-1-1、12WS-18-1、12ZH01和ZS130叶片在PEG-6000模拟干旱胁迫下总花色苷、可溶性糖、可溶性蛋白质和游离脯氨酸含量,并用隶属函数法评价了各品种叶片的综合渗透调节能力。[结果]在PEG-6000模拟干旱胁迫下,5个辣椒品种叶脉、叶肉和叶片的总花色苷含量均为:ZSZ75-1>ZSZ49-1-1>12WS-18-1>12ZH01>ZS130,可溶性糖含量为:12ZH01>12WS-18-1>ZS130>ZSZ49-1-1>ZSZ75-1,可溶性蛋白质含量为:ZSZ75-1>12ZH01>ZSZ49-1-1>12WS-18-1>ZS130,游离脯氨酸含量为:ZS130>ZSZ75-1>12WS-18-1>ZSZ49-1-1>12ZH01;此外,5个品种叶脉、叶肉和整个叶片总花色苷含量间的差异均达到极显著水平,而叶片可溶性糖、可溶性蛋白质和游离脯氨酸含量间的差异均未达到显著水平,不同品种叶片总花色苷、可溶性糖、可溶性蛋白质和游离脯氨酸含量间的相关程度不一致,5个品种叶片的综合渗透调节能力为:ZSZ75-1>ZSZ49-1-1>12WS-18-1>ZS130>12ZH01。[结论]文山州5个辣椒品种特定器官中花色苷的积累利于其叶片在干旱胁迫下渗透调节能力的强化,从而利于其耐旱。