ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (5): 132-139. doi: 10.7668/hbnxb.20190943

Special Issue: Rice Hot Article

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Analysis of Low Nitrogen Tolerance Characteristics of High Quality Local Variety Ehuxiangdao

ZHOU Dahu1,2, QU Ziyang1, NIE Liyun1, LIU Jialong1, FU Junru1, TANG Wenbang2, HE Haohua1   

  1. 1. School of Agricultural Sciences, Jiangxi Agricultural University, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Nanchang 330045, China;
    2. Agricultural College of Hunan Agricultural University, Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Changsha 410128, China
  • Received:2020-05-21 Published:2020-10-28

Abstract: In order to fully exploit high-efficient nitrogen gene resources,improve nitrogen utilization efficiency and reduce environmental pollution,it is very important to screen and evaluate the nitrogen efficiency of high quality rice from existing germplasm resources. The high-quality and low-nitrogen tolerant local variety Ehuxiangdao (EHXD),and the high-quality variety Waiyinqihao(WY7H) were took as the experiment materials,which has the same growth period with EHXD. The application amount of nitrogen was strictly controlled by water culture in seedling stage and barrel planting in growth stage. According to the evaluation index of low nitrogen tolerance in seedling stage and growth stage,we compared the low nitrogen tolerant characteristic of the two varieties. The results showed that there was no significant difference in plant height,fresh weight,dry weight,chlorophyll and total nitrogen content between the treatment of low nitrogen stress and the normal nitrogen treatment in the seedling stage of EHXD;and there was no significant difference in chlorophyll content,total nitrogen content plant height,panicle number and yield per plant under the treatment of low nitrogen stress and the normal nitrogen treatment in the growth stage of EHXD with barrel cultivation. However,most of the evaluation screening indexes of WY7H under the treatment of low nitrogen were significantly lower than that of normal nitrogen treatment. In addition,the major genes expression level in the nitrogen metabolism and assimilation pathway was not significantly suppressed but the low nitrogen tolerance gene (TOND1) was significantly upregulated in EHXD under the low nitrogen treatment. These results showed that EHXD had the characteristics of low nitrogen tolerance and the higher nitrogen efficiency.

Key words: Rice, Low nitrogen tolerance, Screening index, Water culture at seedling stage, Barrel planting during growth period

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Cite this article

ZHOU Dahu, QU Ziyang, NIE Liyun, LIU Jialong, FU Junru, TANG Wenbang, HE Haohua. Analysis of Low Nitrogen Tolerance Characteristics of High Quality Local Variety Ehuxiangdao[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(5): 132-139. doi: 10.7668/hbnxb.20190943.

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