• ISSN 1008-505X
  • CN 11-3996/S
YANG Yu-min, YANG Wu-yun, WAN Hong-shen, ZHANG Ji, LI Jun, LEI Jian-rong, WANG Qin, YANG Lu-fang, TIAN Li, ZHANG Qing-yu. Difference in growth and nutrient accumulation of synthetic wheat with different D genome under nitrogen, phosphorus and potassium stresses[J]. Journal of Plant Nutrition and Fertilizers, 2015, 21(5): 1123-1131. DOI: 10.11674/zwyf.2015.0504
Citation: YANG Yu-min, YANG Wu-yun, WAN Hong-shen, ZHANG Ji, LI Jun, LEI Jian-rong, WANG Qin, YANG Lu-fang, TIAN Li, ZHANG Qing-yu. Difference in growth and nutrient accumulation of synthetic wheat with different D genome under nitrogen, phosphorus and potassium stresses[J]. Journal of Plant Nutrition and Fertilizers, 2015, 21(5): 1123-1131. DOI: 10.11674/zwyf.2015.0504

Difference in growth and nutrient accumulation of synthetic wheat with different D genome under nitrogen, phosphorus and potassium stresses

  • 【Objectives】 Synthetic wheat has many desirable qualities derived from D genome of Aegilops tauschii. The synthetic wheat cultivar, S79 and S80, have the same A and B genomes but different D genome. The two cultivars were used to evaluate the growth, nutrient use efficiency and tolerance to nitrogen(N), phosphorus(P) and potassium(K) stresses,which will provide information for the localization of tolerance genes and improvement of heredity in wheat breeding in the future. 【Methods】 A pot experiment was carried out with the two synthetic wheat cultivar, S79 and S80. N 0.20 g/kg、P2O5 0.15 g/kg and K2O 0.15 g/kg were set as sufficient supplies, no N, P and K as stress. Four treatments were designed: NPK(CK), N0PK, NP0K and NPK0. The plant height and tillering number were investigated once a month during the whole growing stage. The whole plant samples were collected at harvest and divided into root, stem and leaves, shells(ears) and grains. The yield components were investigated. 【Results】 The significant differences in growth, nutrient accumulation and nutrient use efficiency were found between S79 and S80 under N, P or K stress. S80 exhibited lower sensitivity to N and P stress than S79, and demonstrated better performance on growing vigor, effective tiller, stem, leaf, glumes and grain yield per plant. Plant height, root length and the ratio root versus shoot from S80 increased significantly, but these indexes in S79 reduced significantly. Wherea, S79 had lower sensitivity to low K, and showed better agronomic performance than S80 under K stress. Root weight, stem and leaf weight, spike weight and grain weight per plant of S79 were higher than those of S80 under K stress. Although S79 accumulated more N, P and K than S80 under N and K stress, but N, P and K use efficiency and harvest index of S80 were higher than those of S79. Accumulation of N, P and K in the stem, leaf and spike of S80 was higher than those in S79 under P stress. While, N, P and K use efficiency and harvest index of S80 were lower than those of S79. Nutrient distribution rate in grain of S80 was higher than that in S79 under N and P stress, while S79 had higher nutrient distribution rate than S80 under K stress.【Conclusions】The synthetic wheat S80 had the stronger tolerance to N, P stress, and S79 had the greater toleration to K stress. N, P and K use efficiency of S80 were higher than that of S79 under N and K stress, but these indexes of S79 were higher than those of S80 under P stress. S80 increased root length, and expanded the scope of nutrient supply, and increased nutrient supply, and met the requirement for crop growth, and accelerated nutrient transport to ears, and then reduced effect of N, P and K stress on grain yield.
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