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中国农学通报

中国农学通报 ›› 2025, Vol. 41 ›› Issue (33): 6-13.doi: 10.11924/j.issn.1000-6850.casb2024-0726

• 农学·农业基础科学 • 上一篇    下一篇

外源水杨酸喷施对低温胁迫下水稻幼苗生长的影响

朱菲菲1,2(), 陆楚盛1, 张玉芬1, 覃元钰1, 尹媛红1, 彭彬峰1, 叶群欢1, 钟旭华1, 潘俊峰1, 刘彦卓1, 胡香玉1, 胡锐1, 李妹娟1, 王昕钰1, 梁开明1, 傅友强1()   

  1. 1 广东省农业科学院水稻研究所/广东省水稻科学技术重点实验室/广州农业农村部华南优质稻遗传育种实验室（部省共建）/广东省水稻工程实验室，广州 510640
    2 长江大学，湖北荆州 434023
  • 收稿日期:2024-11-29 修回日期:2025-02-15 出版日期:2025-11-25 发布日期:2025-12-01
  • 通讯作者:
    傅友强，男，1984年出生，湖南新化人，研究员，博士，主要从事水稻高产高效栽培理论与养分精准诊断研究。通信地址：510640 广东省广州市天河区金颖东一街3号 广东省农业科学院水稻研究所，Tel：020-87569414，E-mail：。
  • 作者简介:

    朱菲菲，女，2002年出生，硕士，主要从事水稻高产高效栽培与逆境胁迫研究。通信地址：510640 广东省广州市天河区金颖东一街3号 广东省农业科学院水稻研究所，Tel：18396359657，E-mail：。

  • 基金资助:
    国家自然科学基金面上项目“铵硝混配营养提高水稻氮素利用率的根层机制”(32172109); 广东省农业科学院低碳农业与碳中和研究中心“广东省撂荒地改良技术研究与示范”(XT202508); 广东省水稻科学技术重点实验室(2023B1212060042)

Effects of Spraying Exogenous Salicylic Acid on Growth of Rice Seedlings Under Low Temperature Stress

ZHU Feifei1,2(), LU Chusheng1, ZHANG Yufen1, QIN Yuanyu1, YIN Yuanhong1, PENG Binfeng1, YE Qunhuan1, ZHONG Xuhua1, PAN Junfeng1, LIU Yanzhuo1, HU Xiangyu1, HU Rui1, LI Meijuan1, WANG Xinyu1, LIANG Kaiming1, FU Youqiang1()   

  1. 1 Rice Research Institute, Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of New Technology in Rice Breeding/ Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs/Guangdong Rice Engineering Laboratory, Guangzhou 510640
    2 Yangtze University, Jingzhou, Hubei 434023
  • Received:2024-11-29 Revised:2025-02-15 Published:2025-11-25 Online:2025-12-01

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摘要：

为缓解低温胁迫对水稻幼苗的伤害，本研究以‘青香优19香’为试材，设置4个水杨酸浓度(0、10、100、1000 µmol/L)，采用叶片喷施方式，研究不同浓度水杨酸对8℃低温胁迫下水稻幼苗生物量、根系形态及丙二醛含量、脯氨酸含量、抗氧化酶活性等指标的影响。结果发现，低温胁迫下随水杨酸浓度的增加，根系形态、株高和生物量均呈先增后降的趋势，10 µmol/L水杨酸处理最高。与对照相比，10 µmol/L水杨酸处理的水稻幼苗总根长、根表面积、根体积和株高分别增加了36.49%、43.06%、50.67%和17.14%，根系生物量、地上部生物量和总生物量分别增加了46.02%、16.60%和21.93%，脯氨酸和过氧化物酶活性较对照分别增加了529.87%和40.6%，丙二醛含量下降了37.04%。上述结果表明，10 µmol/L的水杨酸主要通过提高过氧化物酶活性和脯氨酸含量，降低丙二醛含量，从而有效缓解水稻幼苗的低温胁迫伤害。

关键词: 水杨酸, 水稻, 低温胁迫, 脯氨酸, 丙二醛, 抗氧化酶活性

Abstract:

To alleviate the damage of low-temperature stress to rice seedlings, a rice cultivar ‘Qingxiangyou 19 xiang’ was used to compare the effects of different concentrations of salicylic acid (0, 10, 100, 1000 µmol/L) by leaf spraying on the biomass, root system architecture, malondialdehyde (MDA), proline and antioxidant enzyme activities of rice seedlings under low temperature (8℃) stress. The results showed that with the increase of salicylic acid concentration, the root system architecture, plant height, and biomass of the rice seedlings under low temperature treatment presented a trend of first increasing and then decreasing, and the indicators were highest in the seedlings sprayed with 10 µmol/L salicylic acid. Compared with the control, the total root length and plant height of rice seedlings increased by 36.49% and 17.14%, respectively, and the root biomass, shoot biomass, and total biomass increased by 46.02%, 16.60%, and 21.93%, the proline content and the peroxidase (POD) activity increased by 529.87% and 40.6%, the MDA content reduced by 37.04%, under 10 µmol/L salicylic acid treatment. The above results indicated that the 10 µmol/L salicylic acid alleviated the low-temperature stress of rice seedlings by increasing POD activity and proline content, and by reducing MDA content.

Key words: salicylic acid, rice, low-temperature stress, proline, malondialdehyde, antioxidant enzyme