Scientia Agricultura Sinica ›› 2023, Vol. 56 ›› Issue (10): 1848-1858.doi: 10.3864/j.issn.0578-1752.2023.10.003

• TILLAGE ＆ CULTIVATION·PHYSIOLOGY ＆ BIOCHEMISTRY·AGRICULTURE INFORMATION TECHNOLOGY • Previous Articles     Next Articles

Effect of Phytochlorin Iron on Stress Tolerance to Waterlogging in Wheat

CHU YanMeng(), MAO YingChao, CAI Jian, ZHOU Qin, DAI TingBo, WANG Xiao(), JIANG Dong   

  1. College of Agriculture, Nanjing Agricultural University/Key Laboratory of Crop Physiology, Ecology and Production Management, Ministry of Agriculture and Rural Affairs, Nanjing 210095
  • Received:2022-08-24 Accepted:2023-01-09 Online:2023-05-16 Published:2023-05-17

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Abstract:

【Objective】Waterlogging stress is one of the main limiting factors for wheat production, especially in the middle and lower reaches of the Yangtze River in China. Improving the waterlogging tolerance of wheat is an important goal to achieve stable and increased yield in this region. In this study, by exploring the suitable use period and concentration of phytochlorin iron, its role in improving waterlogging stress tolerance was further evaluated mainly from the perspectives of plant photosynthesis and plant antioxidant capacity. The research results could provide the theoretical and technical support for waterlogging-resistant cultivation of wheat.【Method】Using Yangmai 16 as material, three concentrations (0.0875, 0.126, and 0.194 mmol·L-1) of phytochlorin iron were set at anthesis and grain filling stages to screen the appropriate period and concentration for achieving a significant increase in wheat yield. Based on this, the effect of phytochlorin iron on wheat tolerance to waterlogging stress at anthesis stage was further evaluated.【Result】Compared with control, treatment with a concentration of 0.126 mmol·L-1 phytochlorin iron at anthesis stage (A2) could significantly increase wheat grain yield by increasing the grain weight. Waterlogging stress at anthesis stage significantly reduced the chlorophyll content, net photosynthesis rate, and post-flowering dry matter accumulation and translocation to grain, resulting in grain yield reduction. However, compared with non-spraying treatment, AW2 treatment showed a higher photosynthetic pigment content, photosystem II stability, net photosynthetic rate. Meantime, the raised activities of antioxidant enzymes, reduced O2- production rate and H2O2 content, which showed correspondence with the reduced accumulation of malondialdehyde content, thus alleviated the damage of cell membrane lipid peroxidation and the yield reduction caused by waterlogging stress.【Conclusion】Spraying a concentration of 0.126 mmol·L-1 phytochlorin iron at anthesis stage could significantly increase wheat yield. Phytochlorin iron could alleviate the plant senescence, reduce damage to PSII, enhance the activity of antioxidant enzymes, reduce the damage of cell membrane lipid peroxidation, maintain higher photosynthetic rate, reduce the degree of yield reduction, and enhance wheat tolerance to waterlogging stress.

Key words: wheat, waterlogging stress, phytochlorin iron, yield, chlorophyll, photosynthesis rate

Table 1

The treatments in experiment I"

处理
Treatment		 处理方式
Treatment method
CK 喷施清水 Spray with water
A1 开花期喷施二氢卟吩铁0.0875 mmol·L-1
0.0875 mmol·L-1 phytochlorin iron at anthesis stage
A2 开花期喷施二氢卟吩铁0.126 mmol·L-1
0.126 mmol·L-1 phytochlorin iron at anthesis stage
A3 开花期喷施二氢卟吩铁0.194 mmol·L-1
0.194 mmol·L-1 phytochlorin iron at anthesis stage
G1 灌浆期喷施二氢卟吩铁0.0875 mmol·L-1
0.0875 mmol·L-1 phytochlorin iron at grain filling stage
G2 灌浆期喷施二氢卟吩铁0.126 mmol·L-1
0.126 mmol·L-1 phytochlorin iron at grain filling stage
G3 灌浆期喷施二氢卟吩铁0.194 mmol·L-1
0.194 mmol·L-1 phytochlorin iron at grain filling stage

Table 2

The treatments in experiment II"

处理
Treatment		 处理方式
Treatment method
CK 喷施清水 Spray with water
A2 开花期喷施二氢卟吩铁0.126 mmol·L-1
0.126 mmol·L-1 phytochlorin iron at anthesis stage
W 渍水胁迫 Waterlogging stress
AW2 开花期喷施二氢卟吩铁0.126 mmol·L-1+渍水胁迫
0.126 mmol·L-1 phytochlorin iron at anthesis stage+ Waterlogging stress

Table 3

Effect of phytochlorin iron on grain yield and yield components of wheat"

处理 Treatment 穗数 Spikes (×104·hm-2) 穗粒数 Kernels per spike 千粒重 1000-kernel mass (g) 实际产量 Grain yield (kg·hm-2)
CK 339.3a 46.4a 37.0b 5486.9b
A1 351.3a 47.3a 39.2ab 5767.1ab
A2 350.0a 48.4a 41.0a 6022.6a
A3 360.0a 47.9a 37.4b 5886.6a
G1 339.3a 46.8a 37.2b 5733.8ab
G2 359.3a 47.5a 37.0b 5769.3ab
G3 336.0a 47.1a 38.3ab 5818.7a

Table 4

Effect of phytochlorin iron on dry matter accumulation and transport in wheat"

处理 Treatment RAP (mg/stem) REP (%) CTA (%) PAA (mg/stem) CPA (%)
CK 704.7a 22.3a 38.4a 1131.5b 61.6b
A1 618.0b 19.9bc 31.7b 1345.4ab 68.3a
A2 612.2b 22.8a 31.5b 1337.8ab 68.5a
A3 616.3b 19.7c 30.2b 1423.0a 69.8a
G1 654.7ab 21.8abc 32.5b 1360.3a 67.5a
G2 650.5ab 22.2ab 32.6b 1348.0ab 67.4a
G3 640.0ab 22.0abc 31.7b 1381.3a 68.3a

Table 5

Effect of phytochlorin iron on grain yield and yield components of wheat under waterlogging stress at anthesis stage"

处理
Treatment		 穗数
Spikes (×104·hm-2)		 穗粒数
Kernels per spike		 千粒重
1000-kernel mass (g)		 实际产量
Grain yield (kg·hm-2)
CK 339.3a 46.4a 37.0b 5486.9b
W 327.3a 46.7a 28.4d 4509.6d
A2 350.0a 48.4a 41.0a 6022.6a
AW2 338.0a 48.1a 30.7c 4890.8c

Table 6

Effect of phytochlorin iron on dry matter accumulation and transport in wheat under waterlogging stress at anthesis stage"

处理 Treatment RAP (mg/stem) REP (%) CTA (%) PAA (mg/stem) CPA (%)
CK 704.7b 22.3c 38.4b 1131.5b 61.6b
W 831.4a 27.3a 48.0a 902.3c 52.0c
A2 612.2c 22.8bc 31.5c 1337.8a 68.5a
AW2 723.4b 24.0b 42.2b 992.0bc 57.8b

Fig. 1

Effect of phytochlorin iron on SPAD at different leaf positions of wheat under waterlogging stress at anthesis stage A: After waterlogging stress for 4 days; B: After waterlogging stress for 10 days. The different letters represent significant difference at P<0.05 level among the treatments in the chart. The same as below"

Fig. 2

Effect of phytochlorin iron on photosynthetic characteristics of wheat flag leaf under waterlogging stress at anthesis stage"

Fig. 3

Effects of phytochlorin iron on fluorescence characteristics of wheat flag leaf under waterlogging stress at anthesis stage"

Fig. 4

Effect of phytochlorin iron on ROS of wheat flag leaf under waterlogging stress at anthesis stage"

Fig. 5

Effect of phytochlorin iron on antioxidant enzymes of wheat flag leaf under waterlogging stress at anthesis stage"

Fig. 6

Correlation analysis of physiological indicators and grain yield of wheat * means significant difference at P<0.05 level among the treatments"

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