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Acta Agronomica Sinica ›› 2019, Vol. 45 ›› Issue (7): 1080-1089.doi: 10.3724/SP.J.1006.2019.84160

• TILLAGE & CULTIVATION · PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Effects of S3307 on the photosynthesis and yield of mung bean at R1 and R5 stages under waterlogging stress

YU Qi1,FENG Nai-Jie1,WANG Shi-Ya1,ZUO Guan-Qiang1,ZHENG Dian-Feng1,2,*()   

  1. 1 College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang, China
    2 National Coarse Cereals Engineering Research Center, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang, China
  • Received:2018-11-26 Accepted:2019-01-19 Online:2019-07-12 Published:2019-03-08
  • Contact: Dian-Feng ZHENG E-mail:byndzdf@126.com
  • Supported by:
    This study was supported by the National Natural Science Foundation of China(31871576);the National Key Technology Support Program of China for the 12th Five-Year Plan(2014BAD07B05)

Abstract:

Waterlogging stress is one of the main abiotic stresses during the growth and development of crops. It is of great significance to explore the mechanisms for improving the flood resistance and waterlogging resistance cultivation of mung bean under waterlogging stress. In this experiment, the effects of uniconazole (S3307) on physiology, photosynthesis and yield of mung bean leaves under waterlogging stress were investigated in pot culture with different flood resistance mung bean varieties Lufeng 2 and Lufeng 5 from 2017 to 2018. Under the stress of waterlogging at different growth stages, the chlorophyll content (SPAD) and photosynthetic characteristic parameters of mung beans leaves were significantly decreased, malondialdehyde (MDA) content was significantly increased. The yield reduction rate of mung beans under the stress of waterlogging was 24.70%-33.63% at the beginning bloom (R1 stage), and 18.07%-28.87% at the beginning seed (R5 stage). Both mung bean varieties showed that the effect of waterlogging stress at R1 stage was greater than that at R5 stage, and the flood resistance of Lufeng 2 was stronger than that of Lufeng 5. After S3307 sprayed, SPAD, net photosynthetic rate (Pn), transpiration rate (Tr), and stomatal conductance (Gs) in the leaves of mung beans could be significantly increased and MDA content could be significantly decreased. The remission rate of mung beans under waterlogging stress was 28.91%-52.34% at R1 stage, and 13.77%-27.36% at R5 stage. The results showed that S3307 sprayed on the leaf surface could effectively alleviate the physiological function and photosynthetic capacity of mung bean leaves under the stress of waterlogging, thus reduce the yield reduction, but there were differences in the regulatory response of mung bean varieties to S3307 in different waterlogging periods.

Key words: mung bean, uniconazole (S3307), waterlogging stress, photosynthesis, yield

Fig. 1

Effects of S3307 on the SPAD of mung bean leaves at R1 and R5 stages under waterlogging stress R1CK: the beginning bloom control; R1W: exposed to waterlogging stress after spraying water at the beginning bloom; R1W+S: exposed to waterlogging stress after spraying S3307 at the beginning bloom; R5CK: the beginning seed control; R5W: exposed to waterlogging stress after spraying water at the beginning seed; R5W+S: exposed to waterlogging stress after spraying S3307 at the beginning seed. R1-0: spayed water or S3307 at the beginning bloom; R1-5: 5 d after the beginning bloom (5 d after spayed water or S3307); R1-10: 10 d after the beginning bloom (5 d after waterlogging stress); R1-15: 15 d after the beginning bloom (recovered 5 d), R5-0: spayed water or S3307 at the beginning seed; R5-5: 5 d after the beginning seed (5 d after spayed water or S3307); R5-10: 10 d after the beginning seed (5 d after waterlogging stress); R5-15: 15 d after the beginning seed (recovered 5 d). Values of SPAD within the same day with different letters are significantly different at the 0.05 probalility level."

Fig. 2

Effects of S3307 on the MDA content of mung bean leaves at R1 and R5 stages under waterlogging stress Abbreviations are the same as those given in Fig. 1. Values of MDA content within the same day with different letters are significantly different at the 0.05 probalility level."

Fig. 3

Effects of S3307 on the photosynthetic rate of mung bean leaves at R1 and R5 stages under waterlogging stress Abbreviations are the same as those given in Fig. 1. Values of the photosynthetic rate within the same day with different letters are significantly different at the 0.05 probalility level."

Fig. 4

Effects of S3307 on the transpiration rate of mung bean leaves at R1 and R5 stages under waterlogging stress Abbreviations are the same as those given in Fig. 1. Values of the transpiration rate within the same day with different letters are significantly different at the 0.05 probalility level."

Fig. 5

Effects of S3307 on the stomatal conductance of mung bean leaves at R1 and R5 stages under waterlogging stress Abbreviations are the same as those given in Fig. 1. Values of the stomatal conductance within the same day with different letters are significantly different at the 0.05 probalility level."

Fig. 6

Effects of S3307 on the intercellular CO2 concentration of mung bean leaves at R1 and R5 stages under waterlogging stress Abbreviations are the same as those given in Fig. 1. Values of the intercellular CO2 concentration within the same day with different letters are significantly different at the 0.05 probalility level."

Table 1

Effects of S3307 on yield and yield components of mung bean at R1 and R5 stages under waterlogging stress in 2017"

品种
Cultivar
处理
Treatment
单株荚数
Pods per plant
单荚粒数
Seeds per pod
百粒重
Hundred grain weight (g)
单株产量
Yield per plant (g)
绿丰2号
Lufeng 2
R1CK 18.55 ± 1.32 a 7.91 ± 0.43 a 3.60 ± 0.10 a 4.78 ± 0.06 a
R1W 13.25 ± 0.35 b 7.46 ± 0.29 a 3.69 ± 0.27 a 3.60 ± 0.46 b
R1W+S 19.70 ± 0.44 a 7.60 ± 0.27 a 3.76 ± 0.05 a 4.77 ± 0.09 a
绿丰5号
Lufeng 5
R1CK 16.45 ± 1.12 a 9.23 ± 0.62 a 5.12 ± 0.01 a 7.19 ± 0.11 a
R1W 11.35 ± 0.69 b 8.36 ± 0.57 a 4.56 ± 0.06 b 5.07 ± 0.09 c
R1W+S 17.75 ± 0.48 a 8.75 ± 0.34 a 5.21 ± 0.05 a 6.53 ± 0.05 b
绿丰2号
Lufeng 2
R5CK 18.55 ± 1.17 a 7.85 ± 0.42 a 3.65 ± 0.12 a 5.12 ± 0.11 a
R5W 18.50 ± 0.31 a 6.73 ± 0.16 b 3.21 ± 0.06 b 4.04 ± 0.86 b
R5W+S 18.70 ± 0.72 a 7.66 ± 0.42 a 3.66 ± 0.09 a 5.15 ± 0.03 a
绿丰5号
Lufeng 5
R5CK 16.45 ± 1.01 a 9.02 ± 0.59 a 5.44 ± 0.09 a 6.93 ± 0.08 a
R5W 16.50 ± 0.66 a 7.64 ± 0.38 b 4.07 ± 0.25 b 5.18 ± 0.30 c
R5W+S 16.75 ± 0.48 a 8.20 ± 0.32 ab 4.44 ± 0.03 b 6.26 ± 0.09 b

Table 2

Effects of S3307 on yield and yield components of mung bean at R1 and R5 stages under waterlogging stress in 2018"

品种
Cultivar
处理
Treatment
单株荚数
Pods per plant
单荚粒数
Seeds per pod
百粒重
Hundred grain weight (g)
单株产量
Yield per plant (g)
绿丰2号
Lufeng 2
R1CK 19.25 ± 0.94 a 7.71 ± 0.33 a 3.62 ± 0.06 a 4.87 ± 0.04 a
R1W 13.75 ± 0.40 b 7.31 ± 0.47 a 3.63 ± 0.27 a 3.55 ± 0.33 b
R1W+S 20.05 ± 0.28 a 7.45 ± 0.25 a 3.64 ± 0.06 a 4.75 ± 0.09 a
绿丰5号
Lufeng 5
R1CK 16.70 ± 0.91 a 8.65 ± 0.45 a 5.20 ± 0.02 a 7.26 ± 0.08 a
R1W 11.90 ± 0.93 b 7.10 ± 0.36 b 5.28 ± 0.09 a 4.82 ± 0.12 b
R1W+S 18.00 ± 0.51 a 8.16 ± 0.44 ab 5.33 ± 0.05 a 7.34 ± 0.04 a
绿丰2号
Lufeng 2
R5CK 19.25 ± 0.94 a 7.71 ± 0.33 a 3.62 ± 0.06 b 4.87 ± 0.04 a
R5W 19.00 ± 0.41 a 6.80 ± 0.12 b 3.95 ± 0.06 a 3.99 ± 0.08 c
R5W+S 19.60 ± 0.56 a 7.31 ± 0.31 ab 3.58 ± 0.12 b 4.54 ± 0.05 b
绿丰5号
Lufeng 5
R5CK 16.70 ± 0.91 a 8.65 ± 0.45 a 5.20 ± 0.02 a 7.26 ± 0.08 a
R5W 16.30 ± 1.00 a 7.20 ± 0.49 c 5.02 ± 0.26 a 5.16 ± 0.31 c
R5W+S 16.85 ± 0.67 a 8.00 ± 0.28 b 5.07 ± 0.02 a 6.25 ± 0.06 b

Table 3

Yield reduction rate and remission rate of yield per plant of mung beans under waterlogging stress in 2017-2018 (%)"

品种
Cultivar
时期
Stage
2017 2018
减产率
Yield reduction rate
缓解率
Remission rate
减产率
Yield reduction rate
缓解率
Remission rate
绿丰2号
Lufeng 2
R1 -24.70 32.40 -27.16 34.08
R5 -21.03 27.36 -18.07 13.77
绿丰5号
Lufeng 5
R1 -29.54 28.91 -33.63 52.34
R5 -25.35 20.86 -28.87 21.18
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