Crops ›› 2017, Vol. 33 ›› Issue (5): 106-111.doi: 10.16035/j.issn.1001-7283.2017.05.018

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Effects of Salt Stress on Growth and Agronomic Traits of Yanfeng 47 and Yanjing 456

Lu Nannan1,2,Yan Lihua1,2,Zheng Chongke2,Yin Haibo1,Guo Shanli1,Xie Xianzhi2   

  1. 1College of Life Sciences,Yantai University,Yantai 264005,Shandong,China
    2Shandong Rice Research Institute,Jinan 250100,Shandong,China
  • Received:2017-06-08 Revised:2017-08-10 Online:2017-10-15 Published:2018-08-26
  • Contact: Shanli Guo,Xianzhi Xie

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Abstract:

To screen rice varieties suitable for planting in the Yellow River delta, we explored the effects of salt stress on seed germination rate, seedling growth and agronomic traits of two rice varieties, Yanfeng 47 and Yanjing 456, treated with either seawater or NaCl solution with different salt concentration. Salt stress obviously damages the growth of both varieties, showing such phenotypes as reduced germination rate, shorter plant height and dead leaves. However, damaged phenotypes were obviously weak in Yanjing 456 compared to Yanfeng 47, suggesting that Yanjing 456 has stronger salt tolerance. Physiological and biochemical experiments revealed that Yanjing 456 has stronger ability in peroxide removal, osmotic regulation and Na+/K+ balance maintenance compared to Yanfeng 47. Either Yanfeng 47 or Yanjing 456 was suitable for planting in saline-alkali field of Yellow River delta by considering their growing date and agronomic traits, however considering the enhanced salt tolerance, it was recommended that Yanjing 456 has greater extension potential for planting on large salt-alkali areas of the Yellow River delta.

Key words: Rice, Salt stress, Germination rate, Salt tolerance, Agronomic traits

Fig.1

Comparison of seed germination between Yanfeng 47 and Yanjing 456"

Fig.2

The effect of sea water with different salinity on the seed germination rate"

Fig.3

The germination rate of seeds treated with 2% NaCl solution * denotes significant differences (P<0.05) according to a t test, the same below"

Fig.4

The average dead leaf rate of rice seedlings treated with 7‰ salinity of sea water for 30 days"

Fig.5

The effect of NaCl stress on different physiological indexes"

Fig.6

Agronomic traits of Yanfeng 47 and Yanjing 456 in paddy field of the Yellow River delta ** denotes significant differences (P<0.01) according to a t test"

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