Effects of Different Concentration of Phosphorus Nutrient on Morphophysiology of Different Scented Rice Varieties at the Seedling Stage

doi:10.7668/hbnxb.20190403

Abstract

Abstract: In order to study the effects of low phosphorus stress on morphophysiology of different scented rice varieties at the seedling stage which were selected preferable scented rice varieties resistant to low phosphorus. A hydroponic experiment was conducted by different P concentration nutrient solution(0,0.25,0.50,2.00,8.00,31.00 mg/L)in natural conditions,different morphophysiological indexes of four scented rice varieties(Lüjinxiang,Huaxiang,Meixiangzhan 2,Haixiangzhan)under different P concentration nutrient solution in different stage(7,14,21,28,31 d)were determined,to reveal morphophysiological differences of different scented rice varieties under different concentration of phosphorus nutrient at the seedling stage.The results showed that under the condition of without P(P concentration was 0 mg/L)at 35 d,Lüjinxiang were higher than other scented varieties in SPAD value(34.58),P accumulation(1.45 mg/bottle),root activity(529.84 μg/(g·h)),shoot-root ratio(0.63),total root length(443.06 cm),total root surface area(152.02 cm²),total root volume(14.15 cm³),total number of root tip and total root length of 0-0.5 mm in diameter(378.43 cm),Huaxiang were higher than other scented varieties in SOD activity(240.39 U/g)and CAT activity(28.03 U/(g·min)),and Meixiangzhan 2 was better than other scented varieties in Na⁺K⁺-ATPase activity(68.97 μmol/(mg·h)). In conclusion,under low phosphorus stress,the low P resistance of the four varieties from strong to weak was Lüjinxiang > Huaxiang > Meixiangzhan 2 > Haixiangzhan,that was Lüjinxiang,a scented rice,was the strongest resistance ability to low phosphorus stress in the experiment.

Key words: Scented rice, Phosphorus, Morphophysiology, Seedling

CLC Number:

S143.2

CHEN Jianxiao, WANG Xiaojuan, TU Naimei, WANG Xiaoning, FU Ceqiang, TANG Qingjie, LIU Aiyu. Effects of Different Concentration of Phosphorus Nutrient on Morphophysiology of Different Scented Rice Varieties at the Seedling Stage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(2): 117-125. doi: 10.7668/hbnxb.20190403.

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