NDLI: Response of maize to mycorrhizal colonization at varying levels of zinc and phosphorus

Content Provider	Springer Nature Link
Author	Subramanian, Kizhaeral S. Bharathi, Chandrasekaran Jegan, Asokkumar
Copyright Year	2008
Abstract	A greenhouse experiment was conducted in a red sandy loam soil (Alfisol) to study the responses of arbuscular mycorrhizal (AM) fungus Glomus intraradices Schenck & Smith inoculated (M+) and uninoculated (M−) maize (Zea mays L) plants exposed to various levels of P (15 and 30 mg kg−1) and Zn (0, 1.25, and 2.5 mg kg−1). Roots and shoots were sampled at 55 and 75 days after sowing and assessed for their nutritional status, root morphology, and root cation exchange capacity (CEC) besides grain quality. Mycorrhizal plants had longer and more extensive root systems than nonmycorrhizal plants, indicating that M+ plants are nutritionally rich, especially with P, which directly assisted in the proliferation of roots. Further, root CEC of M+ plants were consistently higher than those of M− plants, suggesting that mycorrhizal colonization assists in the acquisition of nutrients from soil solution. Mycorrhizal inoculated plants had significantly (P ≤ 0.01) higher P and Zn concentrations in roots, shoots, and grains, regardless of P or Zn levels. The available Zn and P status of AM fungus-inoculated soils were higher than unioculated soils. The data suggest that mycorrhizal symbiosis improves root morphology and CEC and nutritional status of maize plants by orchestrating the synergistic interaction between Zn and P besides enhancing soil available nutrient status that enables the host plant to sustain zinc-deficient conditions.
Starting Page	133
Ending Page	144
Page Count	12
File Format	PDF
ISSN	01782762
Journal	Biology and Fertility of Soils
Volume Number	45
Issue Number	2
e-ISSN	14320789
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-07-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Glomus intraradices Maize Phosphorus Root morphology Zinc Soil Science & Conservation Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Microbiology

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