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Effect of 6-BA or KT on photosynthetic capacity in wheat flag leaf and the weight of 1000 grains under water stress

SHANG Zhen qing 1, LI Ai li 1, DONG Yong hua 1,LI Guang min 2, HAN Jian min 1, WANG Feng ru 1 (1.School of Agronomy,Agricultural University of Hebei, Baoding 071001,China; 2.Hebei Agricultural Academy, Shijiazhuang 050051, China)  
Effect of 6-BA (6-benzylaminopurine) or KT (kinetin) on photosynthesis capacity in wheat (Triticum aestivum L.) flag leaf and the weight of 1000 grains of two different draught resistance wheat cultivars under water stress were studied in plot experiment with rain-proof shelter. Four kinds of experiment treatments were designed for each of the two cultivars. They were as follows: 1) Watering during the anthesis; 2) Not watering during the anthesis; 3) Not watering during the anthesis, treating with 6-BA; 4) Not watering during the anthesis, treating with KT. Three days after the wheat’s anthesis with the soil natural drying, 6-BA or KT (the concentration of 6-BA or KT is 10 μmol·L -1 ) were sprayed on the surface of the leaves once a day. And the spraying continued three days. The results of this experiment suggested that it was able to raise the chlorophyll content of wheat flag leaves, prolong RSP (relative steady phase of chlorophyll content), raise the photosynthetic rate and prolong PAD (photosynthetic active duration) with 6-BA or KT, thus it could raise the weight of 1000 grains.
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