Characteristics of Root System of Wheat Seedlings and Their Relative Grain Yield

doi:10.3321/j.issn:1000-7091.2001.03.019

Abstract

Abstract: The variation in morphology and physiology of root systems of wheat genotypes under phosphorus deficiency are very important in practice.The objectives of this study were to determine the early indicators related to phosphorus efficiency and establish a new method of fast and effectively selecting high phosphorus efficiency wheat genotypes.The results showed that the number of root axes and the length of lateral root of P deficient plant were significantly lower(P0.05) than P sufficient plant;The partitioning of assimilates to root was greater than to shoot at low P supply.The length of root axis and root system and the number of lateral roots were sharply increased under low P stress.The differences in number and length of root axis of the given wheat genotypes between the same or different levels of phosphorus supply were significant(P0 05).This suggests that the two traits are controlled by genotype and external factors.The difference in the characteristics of lateral root of the given wheat genotypes was significant only between different levels of P supply.It shows that the traits of lateral root mainly depend on external factors.The differences in root number and root length,and axis length,root angle and activity of acid phosphatase exuded by roots among 6 wheat genotypes were significant(P0 05).The linear relationships between relative grain yield and the interaction of the morphological and physiological tr

Key words: Wheat, Morphology of roots, Acid phosphatase, P-efficiency

CLC Number:

S512.101

SUN Haiguo, ZHANG Fusuo, YANG Junfang. Characteristics of Root System of Wheat Seedlings and Their Relative Grain Yield[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2001, 16(3): 98-104. doi: 10.3321/j.issn:1000-7091.2001.03.019.

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