白丹凤;李志;齐秀娟;陈锦永;顾红;黄武权;任建杰;钟云鹏;方金豹;

• 1:中国农业科学院郑州果树研究所·中国农业科学院果树生长发育与品质控制重点开放实验室
• 2:浙江省绍兴市上虞区农业技术推广中心

摘要(Abstract)：

【目的】研究淹水胁迫下4种基因型猕猴桃的形态变化及生理响应,以筛选耐涝种质资源,并初步分析猕猴桃耐涝的生理机制。【方法】采用"双套盆"法模拟淹水胁迫,对大籽猕猴桃'KR2’、对萼猕猴桃'KR5’、美味猕猴桃'15-13’及软枣猕猴桃'永丰一号’的两年生组培盆栽苗进行淹水处理,通过统计涝害指数观察淹水对此4种猕猴桃属植物形态的影响,同时通过测定根系活力、叶片光合能力及根系低氧伤害相关指标研究淹水对猕猴桃属4种植物生理代谢的影响,并通过隶属函数法综合评价4份材料的耐涝性。【结果】随着淹水胁迫时间的延长,4种猕猴桃属植物的涝害指数均呈现逐渐上升的趋势,根系活力逐渐下降,光合相关指标呈现先上升后下降的趋势,超氧阴离子产生速率、过氧化氢及丙二醛含量总体呈现逐渐上升的趋势。但在整个淹水胁迫期间',KR2'’KR5’仍能保持较高的根系活力与光合能力,且受到的低氧伤害较小。隶属函数法综合评价结果表明,4种猕猴桃属植物的耐涝性顺序为':KR2’>'KR5’>'15-13’>'永丰一号’。【结论】4种猕猴桃中',KR2’和'KR5’的耐涝性较强',15-13’和'永丰一号’属不耐涝猕猴桃。耐涝猕猴桃在涝害胁迫下可以缓解低氧伤害,维持自身的根系活力,保证地上部的健康生长,进而保证地上部叶片高水平的光合能力,从而表现出较强的耐涝性。

关键词(KeyWords)： 猕猴桃;基因型;耐涝性;生理机制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年科学基金(31801846);; 中国农业科学院科技创新工程(CAAS-ASTIP-2017-ZFRI);; 河南省现代农业产业技术体系(S2014-11)

作者(Author): 白丹凤;李志;齐秀娟;陈锦永;顾红;黄武权;任建杰;钟云鹏;方金豹;

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