Is the inherent potential of maize roots efficient for soil phosphorus acquisition?

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ID: 28595
2014
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Abstract
Sustainable agriculture requires improved phosphorus (P) management to reduce the overreliance on P fertilization. Despite intensive research of root adaptive mechanisms for improving P acquisition, the inherent potential of roots for efficient P acquisition remains unfulfilled, especially in intensive agriculture, while current P management generally focuses on agronomic and environmental concerns. Here, we investigated how levels of soil P affect the inherent potential of maize (Zea mays L.) roots to obtain P from soil. Responses of root morphology, arbuscular mycorrhizal colonization, and phosphate transporters were characterized and related to agronomic traits in pot and field experiments with soil P supply from deficiency to excess. Critical soil Olsen-P level for maize growth approximated 3.2 mg kg(-1), and the threshold indicating a significant environmental risk was about 15 mg kg(-1), which represented the lower and upper levels of soil P recommended in current P management. However, most root adaptations involved with P acquisition were triggered when soil Olsen-P was below 10 mg kg(-1), indicating a threshold for maximum root inherent potential. Therefore, to maintain efficient inherent potential of roots for P acquisition, we suggest that the target upper level of soil P in intensive agriculture should be reduced from the environmental risk threshold to the point maximizing the inherent potential of roots.
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deng2014isplos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Deng, Yan;Chen, Keru;Teng, Wan;Zhan, Ai;Tong, Yiping;Feng, Gu;Cui, Zhenling;Zhang, Fusuo;Chen, Xinping;
Journal PloS one
Year 2014
DOI
DOI not found
URL
http://europepmc.org/articles/PMC3940875?pdf=render
Keywords Keywords not found

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