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Title of Journal: Plant Soil

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Abbravation: Plant and Soil

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Springer Netherlands

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ISSN

1573-5036

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Maize seedling phosphorus nutrition Allocation of

Authors: Muhammad Nadeem Alain Mollier Christian Morel Muhammad Shahid Muhammad Aslam Muhammad ZiaurRehman Muhammad Ashfaq Wahid Sylvain Pellerin
Publish Date: 2013/03/29
Volume: 371, Issue: 1-2, Pages: 327-338
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Abstract

The growth of green plants depends not only on photosynthesis but also on the successful remobilization and translocation of seed phosphorus P reserves to the vegetative parts of the developing seedling during early growth Remobilization and photosynthesis are therefore two parallel and cocoinciding processes involved in better seedling establishment and early growthA study was conducted to evaluate the priority of developing maize seedlings to translocate the remobilized seed P reserves and external P uptake to seedling root and shoot sinks during 4 weeks of early growth Two fluxes of P in growing seedlings one from seed remobilized P reserves and one from external P uptake were distinguished by labelling external nutrient solution P with 32PThe seedling phytomass was equally distributed between seedling roots and shoots for 530 cumulated degree days after sowing Seedlings partitioned up to 71  of P from seed reserves and up to 68  of P acquired from the nutrient solution to the shoots depending on the seed P content and P concentration in the nutrient solution It appears that accumulation of P slows down in seedling roots corresponds to the translocative functions of root P towards shoots for start of photosynthesis

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