| 苏亚拉其其格,樊明寿,贾沙沙,孔硕,贾立国.干旱胁迫对马铃薯移栽组培苗内源激素含量的影响[J].干旱地区农业研究,2019,37(1):227~232 |
| 干旱胁迫对马铃薯移栽组培苗内源激素含量的影响 |
| Effects of drought stress on endogenous hormone content in transplanted tissue culture potato seedlings |
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| DOI：10.7606/j.issn.1000-7601.2019.01.32 |
| 中文关键词: 干旱胁迫 马铃薯 移栽组培苗 激素含量 |
| 英文关键词:drought stress potato transplanted tissue culture seedling endogenous hormones content |
| 基金项目:内蒙古自然科学基金（2018BS03002；2018MS03018）;内蒙古自治区高等学校青年科技英才支持计划( NJYT-17-B20) |
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| 中文摘要: |
| 为深入了解马铃薯抗旱机制，选用马铃薯品种夏坡蒂和根优2号，研究了干旱胁迫对移栽马铃薯组培苗（移栽苗）块茎形成及其内源激素含量的影响。结果表明：基质相对含水量为50%对移栽苗的生长及块茎形成产生抑制作用，其单株薯数、薯重、结薯植株率和整株干物质量均显著低于65%处理，但其地下部干物质分配比例较65%处理高31.75%~36.42%（移栽后55 d）；块茎形成过程中，匍匐茎GA含量、GA/IAA、ZR/IAA、GA/(IAA+ZR)值均为50%处理下明显低于65%处理，分别降低7.45%、26.67%、26.67%和23.08%；而茎与匍匐茎IAA含量则在50%处理下较高。各器官IAA含量随着块茎形成表现为先降后升，但GA/IAA、ZR/IAA和GA/(IAA+ZR)值则先增加后降低。块茎形成进程中，干旱胁迫在植株内部建立新的激素平衡，这可能是激素介导干旱信号影响马铃薯块茎形成的内因之一。 |
| 英文摘要: |
| In order to understand the mechanism of potato responses to drought stress, we used cultivars Shepody and Genyou No. 2 as experimental materials to investigate tuber formation and its endogenous hormone contents under drought stress in this study. The results showed that 50% mediumrelative water content exhibited negative effects on potato plant growth and tuberization, its tubers number and weight of per plant, the rate of potato-bearing plants and dry matter of whole plant were significantly lower than 65% mediumrelative water content, but with higherdistribution of dry matter in underground parts, increased by 31.75~36.42%(after transplanted 55 d) than 65%.In the process of tuberization, the GA content and GA/IAA, ZR/IAA, GA/ (IAA+ZR) ratio in stolon under 50% treatment were significantly lower than that under 65% treatment, lowered by 7.45%, 26.67%, 26.67% and 23.08% respectively; but the IAA contentsin stem and stolon were higher in 50% mediumrelative water content, increased by 1.67% and 22.25% respectively. The IAA content in all organs decreased firstly and then increased, but the ratios of GA/IAA, ZR/IAA, and GA/ (IAA+ZR) increased first and then decreased during tuberization. It is revealed that drought stress may induce new hormone balance in transplanted potato seedlings during tuber formation process, which might be an important mechanism of endogenous hormones as a signal in potato’s response to drought stress. |
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