Crops ›› 2017, Vol. 33 ›› Issue (1): 135-139.doi: 10.16035/j.issn.1001-7283.2017.01.024

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Effects of Waterlogging Stress on the Rice Yuxiang Youzhan Growth and Physiological Characteristics of Seedlings

Luo Haowen,Kong Leilei,Zhong Zhuojun,Xie Luoya,Zhao Xusheng,Lin Ziqiu,Tang Xiangru   

  1. College of Agronomy,South China Agricultural University/Scientific Observing and Experimental Station of Crop Cultivation in South China,Ministry of Agricultur,P. R.China,Guangzhou 510642,Guangdong,China
  • Received:2016-08-30 Revised:2016-10-16 Online:2017-02-15 Published:2018-08-26

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Abstract:

In order to explore the effects of waterlogging stress on rice seedlings, the experiment took Yuxiang Youzhan seedlings as test materials and through pot experiment to study the effects of waterlogging stress on the growth and physiological characteristics of seedlings. The experiments were divided into three treatments: non waterlogged (CK), waterlogged 1.0~1.9cm(W1) and waterlogged 2.0~2.9cm(W2).The results showed that with the deepening of waterlogging, seedling leaf photosynthesis, biomass, soluble sugar decreased significantly, white root number and total number of roots increased significantly. While the SOD activity, POD activity, free proline content showed the trend of falling to rising, and CAT activity, soluble protein content, MDA content showed the trend of rising to falling.

Key words: Rice, Rice seedling, Waterlogging stress, Plant growth, Physiological characteristics

Table 1

Effects of waterlogging stress on the stem and seeding rate"

处理Treatment 成秧率Seeding rate(%) 株高Height(cm) 茎基宽Basal diameter (cm) 茎干重Basal dry weight(g) 茎鲜重Basal fresh weight(g)
CK 73.33a 29.627a 0.2600a 0.1320a 1.0467a
W1 44.83b 20.397b 0.2533a 0.0953b 0.6267b
W2 39.67b 19.837b 0.2567a 0.0906b 0.6567b

Table 2

Effects of waterlogging stress on seeding leaf"

处理Treatment 总叶面积Total leaf area(cm2) 叶鲜重Leaf fresh weight(g) 叶干重Leaf dry weight(g) 绿叶数The number of green leaf
CK 10.009a 0.9000a 0.2429a 3.4a
W1 5.651b 0.3033b 0.1565b 3.1b
W2 5.145b 0.3567b 0.1478b 2.8b

Table 3

Effects of waterlogging stress on seeding root system"

处理Treatment 白根数The number of white root 总根数The number of root 根鲜重Root fresh weight (g) 根干重Root dry weight (g)
CK 0.6c 7.57b 0.3467a 0.1296a
W1 1.3b 8.10ab 0.1300c 0.0772b
W2 1.9a 8.60a 0.2233b 0.0634b

Table 4

Effects of waterlogging stress on seeding photosynthetic pigment contents"

处理
Treatment		 叶绿素相对含量
SPAD values		 叶绿素a (mg/g)
Chlorophyll a		 叶绿素b (mg/g)
Chlorophyll b		 类胡萝卜素(mg/g)
Carotenoid		 总叶绿素(mg/g)
Total chlorophyll		 叶绿素a/b
Chlorophyll a/b
CK 28.5a 1.6635a 0.5337a 0.3109a 2.3210a 3.1158c
W1 27.2b 1.3577ab 0.4265ab 0.2648b 1.8823ab 3.1805b
W2 24.8c 1.2020b 0.3743b 0.2399b 1.6647b 3.2093a

Table 5

Effects of waterlogging stress on soluble protein content, soluble sugar content and free proline content"

处理
Treatment		 可溶性蛋白
含量(μg/g)
Soluble proteint
content		 可溶性糖
含量(mg/g)
Soluble sugar
content		 游离脯氨酸
含量(μg/g)
Free proline
content
CK 51.448b 40.767a 26.441a
W1 60.332a 35.767ab 18.633b
W2 55.866ab 32.536b 23.799ab

Table 6

Effects of waterlogging stress on seeding peroxidase activity, super-oxide dismutase activity,catalase activity and MDA content"

处理
Treatment		 POD活性[U/(g·min)]
Peroxidase activity		 SOD活性(U/g)
Super-oxide dismutase activity		 CAT活性[U/(g·min)]
Catalase activity		 MDA含量(μmol/g)
Propanedial content
CK 104.25b 104.55b 168.45b 8.479b
W1 100.34b 69.83c 209.69a 12.338a
W2 117.10a 120.43a 155.42b 10.448ab
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