Crops ›› 2016, Vol. 32 ›› Issue (3): 139-143.doi: 10.16035/j.issn.1001-7283.2016.03.026

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Effects of Exogenous Substances on Physiological Characteristics in Wheat after Anthesis under Water Stress

Wang Hezheng,Liu Huan,Li Bei,Sun Chenglong,Yin Bingbing,Zhang Jun,Bao Xinzhi   

  1. College of Agricultural,Henan University of Science and Technology,Luoyang 471003,Henan,China
  • Received:2016-02-04 Revised:2016-05-16 Online:2016-06-15 Published:2018-08-26

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Abstract:

In order to explore the effect of different exogenous substance on physiological characteristics in wheat under water stress, to screen exogenous substances and its application methods for enhancing drought resistance of wheat, different combinations of fulvic acid, proline, potassium dihydrogen phosphate, glucose were selected for the study. Exogenous substances were sprayed at wheat heading stage. The flag leaf photosynthetic rate, soluble sugar, soluble protein, malondialdehyde (MDA) content, superoxide dismutase (SOD), peroxidase (POD) activity were studied after heading.The results showed that spraying exogenous substances increased photosynthetic rate, soluble sugar content, soluble protein content and the protective enzyme activity in flag leaf under water stress, but MDA content decreased, which might result in the increase of the wheat drought resistance and the grain yield. The results showed that exogenous substances could enhance the drought resistance of wheat, increase wheat yield.The compound of fulvic acid, proline, glucose and potassium dihydrogen phosphate was the best treatment group.

Key words: Wheat, Water stress, Exogenous substances, Physiological characteristics

Fig.1

Effects of different treatment on photosynthetic rate of flag leaf in wheat Different lowercase between different treatments indicate significant difference at 0.05 level, the same below"

Fig.2

Effects of different treatment on soluble sugar content of flag leaf in wheat"

Fig.3

Effects of different treatment on soluble protein content of flag leaf in wheat"

Fig.4

Effects of different treatment on MDA content of flag leaf in wheat"

Fig.5

Effects of different treatment on SOD activity of flag leaf in wheat"

Fig.6

Effects of different treatment on POD activity of flag leaf in wheat"

Table 1

Effects of different treatment on wheat yield and yield components"

处理Treatment 穗数Spike number(万穗/hm2) 穗粒数Grain number per spike 千粒重1000-grain weight(g) 产量Yield(kg/hm2)
CK 559.4a 32.8c 36.9b 5 377.1c
T1 547.2a 33.5bc 38.0a 5 648.1c
T2 580.3a 34.3b 39.7a 6 049.7b
T3 557.1a 33.7b 38.8a 5 809.1b
T4 562.5a 34.1b 39.3a 5 946.2b
T5 550.9a 36.6b 40.2a 6 715.2a
T6 553.6a 35.3b 40.0a 6 265.2b
T7 571.5a 39.2a 40.4a 7 027.1a
T8 562.7a 39.5a 40.5a 7 107.2a
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