Mycorrhizal growth and phosphorus responses of tropical soybean (Glycine max L.) cultivars differ with arbuscular mycorrhizal fungi isolates and phosphorus application rates in a derived-savanna zone of Nigeria. (9th May 2022)

• Record Type: Journal Article
• Authors: Adeyemi, Nurudeen Olatunbosun; Atayese, Mufutau Olaoye; Sakariyawo, Olalekan Suleiman; Azeez, Jamiu Oladipupo
• Is Part Of: Journal of plant nutrition. Volume 45:Number 8(2022)
• Page Start: 1223
• Page End: 1239
• Publication Date: 2022-05-09
• Subjects: biofertilizer -- mycorrhizal dependency -- plant nutrition -- soil fertility -- sustainable agriculture; Plants -- Nutrition -- Periodicals; Plants -- Effect of minerals on -- Periodicals; Deficiency diseases in plants -- Periodicals; 575.76
• DOI: 10.1080/01904167.2021.1994593
• Languages: English
• ISSNs: 0190-4167

Abstract

Abstract: Arbuscular mycorrhizal fungi (AMF) form symbiosis with most crops and provide a sustainable approach to promote crop productivity in phosphorus (P) deficient soils. There is scarcity of information on mycorrhizal growth and P responses in relation to different AMF isolates, P rates and soybean cultivars in Nigeria. Thus, field experiments were conducted for two consecutive years (2017 − 2018) to explore the impacts of different AMF isolates ( Funneliformis mosseae, Rhizophagus intraradices and Claroideoglomus etunicatum ) and P application rates (0, 20 and 40 kg P2 O5 ha −1 ) on plant growth, mycorrhizal responses, nodulation, P nutrition and grain yield of two soybean cultivars (TGx 1448-2E and TGX 1440-1E). The results showed that mycorrhizal inoculation significantly enhanced root colonization, shoot biomass, nodulation, P uptake, P use efficiency and grain yield of the soybean cultivars compared to control. Inoculation of R. intraradices and F. mosseae consistently favored mycorrhizal responses compared to C. etunicatum . Application of high P rate (40 kg ha −1 ) negatively affected root colonization, mycorrhizal growth and P responses in inoculated plants. Both cultivars showed similar mycorrhizal responses. Mycorrhizal growth and P responses were significantly enhanced with inoculation of R. intraradices or F. mosseae and P rate of 20 kg ha −1, which resulted in increased P uptake, shoot biomass and grain yield in both cropping years . The findings indicated that inoculation of R. intraradices or F. mosseae with moderate P rate (20 kg ha −1 ) is optimal to promote plant growth, P nutrition and grain yield of tropical soybean for sustainable cultivation in Nigeria.