氯胆·萘乙酸缓解生姜幼苗淹水胁迫的生理机制  

Physiological Mechanism of Choline Chloride Naphthyl Acetic Acid Alleviating Waterlogging Stress in Ginger Seedlings

作　　者：孙秉鑫 刘璇 王迪 吕尧 徐坤[1] SUN Bing-xin;LIU Xuan;WANG Di;LV Yao;XU Kun(College of Horticultural Science and Engineering/Shandong Agricultural University,Tai'an 271018,China)

机构地区：[1]山东农业大学园艺科学与工程学院,山东泰安271018

出　　处：《山东农业大学学报(自然科学版)》2025年第1期160-166,共7页Journal of Shandong Agricultural University:Natural Science Edition

基　　金：山东省自然科学基金(ZR2022QC009);国家自然科学基金(32302530)。

摘　　要：生姜根系不发达,抗逆性较弱,洪涝灾害易导致根系腐烂,生长衰弱,产量显著降低。为探究缓解生姜淹水胁迫的方法,本试验研究了不同淹水时间对生姜生长的影响,探讨了叶面喷施不同浓度氯胆·萘乙酸(CC·NAA)对缓解淹水胁迫的效果。结果表明,随淹水时间的延长,生姜根系损伤加重,根系活力显著降低,淹水2 d即可导致根系褐变,超过3 d则植株死亡。淹水2 d生姜植株随CC·NAA叶面喷施浓度的升高,根系活力呈现先升高后降低的趋势,处理5 d时,0.10 g·L^(−1) CC·NAA处理的根系活力较CK显著提高了65.15%。CC·NAA显著提高了淹水胁迫下生姜叶片叶绿素含量,减轻了气孔与非气孔限制,促进了水气交换能力,0.10 g·L^(−1)CC·NAA处理的净光合速率、气孔导度分别较CK提高了9.61倍和1.54倍,F_(v)/F_(m)和Φ_(PSⅡ)分别提高了69.05%和57.14%。此外,CC·NAA还显著提高叶片和根系可溶性蛋白和脯氨酸含量,增强抗氧化酶活性,降低活性氧积累,减轻膜质过氧化程度。Since ginger has an underdeveloped root system and weak stress tolerance,an flooding disaster can easily lead to the rotten root,weakened growth and significantly reduced yield.In order to find the methods to alleviate the flooding stress,this experiment investigated the effects of different waterlogging time on ginger growth,and explored the mitigation effect of foliar spraying with different concentrations of chlorocholine-naphthalene acetic acid(CC·NAA)on the alleviation of waterlogging stress.The results showed that with the extension of waterlogging time,the vitality of root system decreased significantly,and the stress could lead to root browning in 2 d and plant death in more than 3 d.With the increase of CC·NAA foliar spraying concentration,With the increase of CC·NAA foliar spraying concentration,the root activity of ginger plants subjected to 2 days of waterlogging showed a trend of first increasing and then decreasing.After 5 days of treatment,the root activity of the 0.10g·L^(−1) CC·NAA treatment was significantly increased by 65.15%compared to the control(CK).CC·NAA significantly increased the content of chlorophyll in ginger leaves under waterlogging stress,reduced stomatal and non-stomatal limitation,and promoted water-air exchange capacity.The net photosynthetic rate and stomatal conductance of 0.10 g·L^(−1)CC·NAA treatment were increased by 9.61-fold and 1.54-fold compared to the control(CK),respectively.Additionally,F_(v)/F_(m) and Φ_(PSⅡ) were elevated by 69.05%and 57.14%,respectively.In addition,CC-NAA significantly increased the content of soluble protein and proline in leaves and roots,enhanced the activity of antioxidant enzymes,reduced the accumulation of reactive oxygen species,and attenuated the degree of membrane peroxidation.

关 键 词：生姜 淹水胁迫 氯胆·萘乙酸 水汽交换参数 抗氧化系统 

分 类 号：S632.5[农业科学—蔬菜学]