NDLI: Is the Inherent Potential of Maize Roots Efficient for Soil Phosphorus Acquisition?

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Is the Inherent Potential of Maize Roots Efficient for Soil Phosphorus Acquisition?

Content Provider	PubMed Central
Author	Deng, Yan Chen, Keru Teng, Wan Zhan, Ai Tong, Yiping Feng, Gu Cui, Zhenling Zhang, Fusuo Chen, Xinping
Editor	Bennett, Malcolm
Copyright Year	2014
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.
Related Links	http://dx.doi.org/10.1371/journal.pone.0090287
Starting Page	90287
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	3
Volume Number	9
Language	English
Publisher	Public Library of Science
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Is the Inherent Potential of Maize Roots Efficient for Soil Phosphorus Acquisition?

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Is the Inherent Potential of Maize Roots Efficient for Soil Phosphorus Acquisition?