The effect of phosphorus deficiency on nutrient up

Authors: Muhammad Iqbal Chaudhary Joseph J AduGyamfi Hirofumi Saneoka Nguyen Tran Nguyen Ryuichi Suwa Shynsuke Kanai Hany A ElShemy David A Lightfoot Kounosuke Fujita

Publish Date: 2008/02/28

Volume: 30, Issue: 4, Pages: 537-544

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Abstract

Phosphorous P fertilization is the major mineral nutrient yield determinant among legume crops However legume crops vary widely in the ability to take up and use P during deficiency The aim here was to compare P uptake and translocation biological nitrogen fixing ability and photosynthetic rate among mashbean Vigna aconitifolia cv ‘Mash88’ mungbean Vignaradiata cv ‘Moong6601’ and soybean Glycine max L cv ‘Tamahomare’ during deficiency in hydroponics Two treatments the withdrawal of P from the solution Pdeprivation and continued P at 160 μM P sufficient were effected at the pod initiation stage Plants were grown for 20 days Shortterm labeling with 32P showed the uptake and distribution of P into plant parts Withdrawal of P from the solution reduced biomass photosynthetic activity and nitrogen fixing ability in mungbean and mashbean more than in soybean P deprivation decreased P accumulation more than N accumulation The decrease was more severe in mungbean and mashbean than soybean More P was translocated and distributed into leaves in soybean than in mungbean and mashbean Leaf P amount was more correlated to leaf area than to photosynthetic rate per unit leaf area among all three legume species The results indicate that selection for increased efficiency of P utilization and leaf area may be used to improve leguminous crops

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