Phosphorus use efficiency in the symbiosis soybean-rhizobium-arbuscular mycorrhiza: implications in phosphorus and nitrogen metabolism

• Grant number: 16/06396-1
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2016
• End date: June 30, 2018
• Field of knowledge: Agronomical Sciences - Agronomy
• Principal Investigator: Sara Adrian Lopez de Andrade
• Grantee: Sara Adrian Lopez de Andrade
• Host Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated researchers: Adriana Parada Dias da Silveira

Abstract

The symbiotic association with rhizobia and arbuscular mycorrhizal fungi (AMF) can benefit soybean plants by increasing biomass production, fact that has been related to the higher nitrogen (N) supply arisen from the symbiotic N2 fixation (SNF) and the increase in phosphorus (P) uptake by arbuscular mycorrhiza (AM). In Brazil, the SNF is highly efficient in soybean, reducing the need for N fertilizer. However, the productivity and the SNF itself have to overcome other limiting factors such as P shortage, a common condition in most agricultural soils of the country. For these reasons the understanding of the mechanisms of P absorption, transport, use and remobilization are essential to the P use efficiency (PUE) and becomes highly relevant. P remobilization from organic compounds, either internal or external to the plant, is considered a key factor in the EUP, at this respect acid phosphatases, secreted or intracellular, are related to this process in different tissues or organs. Thus, this project proposes to evaluation of AM influence in PUE by determining the activity of acid phosphatases and the level of purple acid phosphatases gene expression in different plant organs (root, nodules and young and mature leaves) and correlate with parameters related to phosphorus nutrition, biomass production and with SNF. The results will evaluate the contribution of AM in PUE and in the allocation of this nutrient within plant and relates them with the SNF, the N metabolism and biomass production in soybean plants, contributing to scientific and technological advancement in the search for a more sustainable agriculture. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BULGARELLI, RAFAELA GAGETI; DE OLIVEIRA, VINICIUS H.; LOPEZ DE ANDRADE, SARA ADRIAN. Arbuscular mycorrhizal symbiosis alters the expression of PHT1 phosphate transporters in roots and nodules of P-starved soybean plants. THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY, v. 32, n. 3, AUG 2020. (16/06396-1)

BULGARELLI, RAFAELA GAGETI; CORREIA MARCOS, FERNANDA CASTRO; RIBEIRO, RAFAEL VASCONCELOS; LOPEZ DE ANDRADE, SARA ADRIAN. Mycorrhizae enhance nitrogen fixation and photosynthesis in phosphorus starved soybean (Glycine max L. Merrill). ENVIRONMENTAL AND EXPERIMENTAL BOTANY, v. 140, p. 26-33, AUG 2017. (16/06396-1)