马铃薯块茎膨大期不同程度干旱后 复水的源库补偿效应

ISWC OpenIR > 水保所知识产出(1956---)

	马铃薯块茎膨大期不同程度干旱后复水的源库补偿效应
	刘溢健 1; 任建宏 2; 殷俐娜 1,3; 邓西平 2,3; 可庆波 3; 王仕稳 1,3
	2019
发表期刊	应用生态学报
卷号	30 期号:11 页码:3777-3786
摘要	旱后复水的补偿效应在多种作物的不同生育时期都存在，是植物抵抗逆境胁迫和伤害的重要自我调节机制，也是对有限水分高效利用的体现．本研究在马铃薯块茎膨大期进行两轮干旱后复水处理，明确马铃薯补偿效应产生的干旱胁迫阈值，并从源-库角度探索马铃薯旱后复水补偿效应产生的缘由．试验选取‘大西洋’马铃薯脱毒组培苗为材料，设置充分供水 ( W) 、轻度干旱后复水( D1-W) 、中度干旱后复水( D2-W) 和重度干旱后复水( D3-W) 4 个水分处理并经过两个循环．结果表明: 在经过两轮轻度干旱复水后，马铃薯产量表现出超补偿效应，水分利用效率和产量比充分供水分别提高了 17．5%和 6．3%; 中度水分胁迫表现出近等量补偿效应，产量与充分供水差异不大，而水分利用效率提高了 8．4%; 而重度水分胁迫没有表现出产量补偿效应．不同程度的干旱胁迫均降低马铃薯叶片叶绿素含量、净光合速率、叶面积等源的大小和活性，而在复水后，轻度和中度胁迫出现了超补偿和补偿效应，增强了源的供应能力．同时，适度干旱后复水显著增强了块茎( 库) 中蔗糖-淀粉代谢途径关键酶的活性，提高了库活性，进而表现为块茎平均重量的增加．综上，马铃薯块茎膨大期适度的水分亏缺在复水后源-库均存在补偿和超补偿效应，以此来弥补干旱带来的损失，最终在产量上表现为补偿或者超补偿效应，并显著提高了水分利用效率．
其他摘要	The compensation effect of re-watering after drought has been widely reported in various crops during different growth stages． It is considered as an important self-regulation mechanism for plants to resist abiotic stresses and also an efficient utilization of limited water resource． In this study， two rounds of re-watering after drought treatments were carried out during tuber expansion period of potato，to investigate the drought threshold of potato and explore the potential mechanisms of com- pensation effect with source-sink aspect． We used virus-free plantlets of “Atlantic”potato as experimental materials． Four treatments were included: sufficient water supply ( W) ，re-watering after mild drought ( D1-W) ，re-watering after medium drought ( D2-W) and re-watering after severe drought ( D3-W) ． The results showed that potato yield exhibited an over-compensation effect after two rounds of D1-W treatment，with water use efficiency and yield being increased by 17．5% and 6．3%，respectively，compared with the sufficient water supply． D2-W treatment had no significant effect on potato yield，but water use efficiency was increased by 8．4%，indicating a near-equivalent compensation effect． On the contrary，D3-W treatment did not show any compensation effect in yield． In addition，leaf chlorophyll content，net photosynthetic rate，and leaf area were all reduced after drought treatment，indicating a reduction in“source”size and activity． After re-watering，D1- W and D2-W treatments showed over-compensation and compensation effects through improving source supply capacity． Meanwhile，re-watering after moderate drought increased the sink activity through significantly enhancing the activities of key enzymes in tubers ( sink) ，thus increased the average weight of tubers． In conclusion，re-watering after moderate drought stress during potato tuber expansion period had compensation and over-compensation effects on both source and sink， and thus could compensate for the drought-induced yield loss and improve water use efficiency．
关键词	干旱胁迫复水补偿效应源-库
收录类别	中文核心期刊要目总览
语种	中文
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/9268
专题	水保所知识产出(1956---)
作者单位	1.西北农林科技大学资源环境学院 2.西北农林科技大学生命科学学院 3.中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
推荐引用方式 GB/T 7714	刘溢健,任建宏,殷俐娜,等. 马铃薯块茎膨大期不同程度干旱后复水的源库补偿效应[J]. 应用生态学报,2019,30(11):3777-3786.
APA	刘溢健,任建宏,殷俐娜,邓西平,可庆波,&王仕稳.(2019).马铃薯块茎膨大期不同程度干旱后复水的源库补偿效应.应用生态学报,30(11),3777-3786.
MLA	刘溢健,et al."马铃薯块茎膨大期不同程度干旱后复水的源库补偿效应".应用生态学报 30.11(2019):3777-3786.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
马铃薯块茎膨大期不同程度干旱后复水的源库（1944KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载