| 引用本文: | 王一博,牛晓丽,代智光,等.局部灌水下6-BA对玉米幼苗生长和内源化学信号的影响[J].灌溉排水学报,0,():-. |
| Wang Yibo,Niu Xiaoli,Dai Zhiguang,et al.局部灌水下6-BA对玉米幼苗生长和内源化学信号的影响[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】明确局部灌水下6-BA对玉米幼苗生长和内源化学信号的影响。【方法】设置了无水分胁迫对照处理（正常灌水，CK）、前期均匀供水后局部供水（局部亏水，PD）、前期均匀供水后局部供水+6-BA（PDT）、前期均匀水分胁迫后局部复水（局部复水，PR）、前期均匀水分胁迫后局部复水+6-BA（PRT）5个处理，研究局部灌水下喷施6-BA对玉米生长指标和根系、茎部木质部汁液和叶片化学信号的影响。【结果】与CK相比，PD处理显著提高了玉米幼苗供水侧根系干质量、地上部干质量和叶面积，但不利于亏水侧根系干质量的增长，同时提高了叶片、供水侧根系和木质部汁液玉米素（ZA）、硝态氮（NO3-）和可溶性蛋白（Cpr）量，并降低了脱落酸（ABA）量；PR处理显著降低了玉米幼苗两侧根系干质量、地上部干质量和叶面积，另外降低了叶片、两侧根系和木质部汁液ZA、NO3-和Cpr量，并提高了ABA量。PDT、PRT处理分别相比PD、PR处理，均提高了玉米幼苗两侧根系干质量、地上部干质量和叶面积以及不同生长部位ZA、NO3-和Cpr量，并降低了不同部位ABA量，有利于强化玉米整体的补偿生长。【结论】前期充分灌水后局部亏水处理更有利于刺激玉米的补偿生长，在局部灌水基础上额外喷施6-BA能够强化玉米幼苗整体的补偿生长效果，各化学信号对玉米生长发育调节作用不同。 |
| 关键词: 局部灌水；6-BA；生长指标；化学信号；补偿生长 |
| DOI： |
| 分类号:S513 |
| 基金项目:国家自然科学基金(51709263)；河南省科技攻关项目(212102110035)；河南科技大学博士科研启动(13480023)；河南科技大学SRTP项目(2021074) |
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| Effects of 6-BA on Growth and Endogenous Chemical Signals of Maize Seedlings under Partial Irrigation |
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Wang Yibo1, Niu Xiaoli1, Dai Zhiguang1, Zhao ben2, Ma Tiancheng1, Wang Jiachen1, Wang Zhihao1
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1.Henan University of Science and Technology;2.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences
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| Abstract: |
| 【Objective】The purpose of this paper is to determine the effect of 6-BA on growth and endogenous chemical signals of maize seedlings under partial irrigation.【Method】Three irrigation methods and 10 mg/L 6-BA were adopted, including no water stress control treatment (normal irrigation, CK), partial water supply after uniform water supply in the early stage (partial water deficit, PD), partial water supply after uniform water supply in the early stage +6-BA(PDT), partial rehydration after uniform water stress in the early stage (partial rehydration, PR) and partial rehydration after uniform water stress in early stage+6-BA (PRT).【Result】Compared with CK, PD treatment significantly increased root dry weight at water supply side, aboveground dry weight and leaf area of maize seedlings, but it was not conducive to the growth of root dry weight at water deficit side. At the same time, it increased the contents of zeatin (ZA), nitrate nitrogen (NO3-) and soluble protein (Cpr) in leaves, roots at water supply side and xylem juice, and decreased the content of abscisic acid (ABA). PR significantly reduced the dry weight of roots on both sides, the dry weight of aboveground parts and leaf area of maize seedlings, and also reduced the contents of ZA, NO3- and Cpr in leaves, roots on both sides and xylem sap, and increased the content of ABA. Compared with PD and PR, PDT and PRT increased the dry weight of roots on both sides, the dry weight of shoots and the leaf area of maize seedlings, and the contents of ZA, NO3- and Cpr in different growing parts, while reducing the ABA content in different parts, which was beneficial to strengthen the compensatory growth of maize as a whole.【Conclusion】Partial water deficit treatment after full irrigation in the early stage is more conducive to stimulating the compensatory growth of maize. At the same time, spraying 6-BA on the basis of partial irrigation can strengthen the overall compensatory growth effect of maize seedlings, and each chemical signal has different regulating effects on the growth and development of maize. |
| Key words: partial irrigation; 6-BA; growth index; chemical signal; compensatory growth |
