Effects of Zn-deficiency on Plant Growth and Uptake of P and Zn in Different P-Genotype Maize

doi:10.7668/hbnxb.2009.05.027

Abstract

Abstract: Three low-P tolerant maize genotypes M11,M08 and M02,and three low-P sensitive maize genotypes M06,M07 and M12 were applied to detect the effects of different zinc levels on their growth and uptake of P and Zn at seedling stage.The results demonstrated that Zn deficiency severely hindered the growing of maize.Zn deficiency had a negative influence on plant height,number of leaves and dry weight.Not only did treatment of Zn deficiency severely decreased the absorbing of P and Zn,but Zn stress had greater effect on low-P sensitive genotypes than low-P tolerant genotypes for content of Zn at seedling stage.Under Zn deficiency condition,the content of P in shoot of sensitive genotypes were significant increased,but those in root were less effected;on the other hand,the content of P was significant decreased in root of tolerant genotypes.There were differences of P utilizat ion efficiency in response to Zn deficiency among different genotypes.P utilization efficiency in shoot of sensitive genotypes was decreased but those in root of tolerant genotypes were increased.

Key words: Maize, Low-P tolerant, Genotype, Zn

CLC Number:

S513.01

ZHANG Ai-qun, XU Dong-sheng, CUI Xue-mei, ZHAO Li-yan. Effects of Zn-deficiency on Plant Growth and Uptake of P and Zn in Different P-Genotype Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2009, 24(5): 130-134. doi: 10.7668/hbnxb.2009.05.027.

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