Crops ›› 2022, Vol. 38 ›› Issue (3): 161-167.doi: 10.16035/j.issn.1001-7283.2022.03.023

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Effects of Drought Stress on Physiological Indexes of New Sugarcane Variety Guire 2

Tan Qinliang1(), Cheng Qin1, Pan Chenglie2, Zhu Pengjin1, Li Jiahui1, Song Qiqi1, Nong Zemei1, Zhou Quanguang1, Pang Xinhua1(), Lü Ping1   

  1. 1Guangxi Subtropical Crops Research Institute, Nanning 530001, Guangxi, China
    2Guangxi Tianyuan Biological Chemistry Co., Ltd., Nanning 530001, Guangxi, China
  • Received:2021-04-02 Revised:2021-05-10 Online:2022-06-15 Published:2022-06-20
  • Contact: Pang Xinhua E-mail:469118251@qq.com;gxpxh@126.com

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Abstract:

In order to investigate the response mechanism of the sugarcane variety Guire 2 (GR2) to drought stress and exogenous abscisic acid (ABA) with ROC22 as control (CK), the natural drought method was set, the GR2 was used for the change properties of physiological indices under drought stress with different number of days. The results showed that the content of endogenous hormones, the activity of antioxidant enzymes and the content of osmotic substances in the leaves of GR2 were significantly increased under drought stress. Compared with the drought-resistant CK, soluble protein, soluble sugar contents of GR2 were relatively strongly increased in the early period (0-5d), MDA content was relatively stable, the activities of ABA, SOD and APX growth was relatively high in the middle period (7-9d). Exogenous ABA treatment could effectively increase the accumulation of hormone content, the activities of the antioxidant enzymes (SOD, APX and POD), and relieve the accumulation of osmotic substances effectively. It was suggested that GR2 was a variety of sugarcane that has strong drought resistance, and exogenous ABA may improve its ability of drought resistance.

Key words: Sugarcane, Drought stress, Physiological indexes, ABA, Antioxidase

Fig.1

The contents of the sugarcane endogenous ABA under different treatments Different lowercase letters indicate significant difference (P < 0.05), the same below"

Fig.2

The content of the sugarcane endogenous GA under different treatments"

Fig.3

The content of the sugarcane endogenous IAA under different treatments"

Fig.4

The activity of the sugarcane SOD under different treatments"

Fig.5

The activity of the sugarcane POD under different treatments"

Fig.6

The activity of the sugarcane APX under different treatments"

Fig.7

The content of the sugarcane MDA under different treatments"

Fig.8

The content of the sugarcane SP under different treatments"

Fig.9

The content of the sugarcane SS under different treatments"

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