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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Photosynthesis is induced in rice plants that associate with arbuscular mycorrhizal fungi and are grown under arsenate and arsenite stress

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Author(s):
Lopez de Andrade, Sara Adrian [1] ; Domingues, Jr., Adilson Pereira [1] ; Mazzafera, Paulo [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Chemosphere; v. 134, p. 141-149, SEP 2015.
Web of Science Citations: 15
Abstract

The metalloid arsenic (As) increases in agricultural soils because of anthropogenic activities and may have phytotoxic effects depending on the available concentrations. Plant performance can be improved by arbuscular mycorrhiza (AM) association under challenging conditions, such as those caused by excessive soil As levels. In this study, the influence of AM on CO2 assimilation, chlorophyll a fluorescence, SPAD-chlorophyll contents and plant growth was investigated in rice plants exposed to arsenate (MV) or arsenite (Ash!) and inoculated or not with Rhizophagus irregularis. Under AsV and Mill exposure, AM rice plants had greater biomass accumulation and relative chlorophyll content, increased water-use efficiency, higher carbon assimilation rate and higher stomatal conductance and transpiration rates than non-AM rice plants did. Chlorophyll a fluorescence analysis revealed significant differences in the response of AM-associated and -non-associated plants to As. Mycorrhization increased the maximum and actual quantum yields of photosystem II and the electron transport rate, maintaining higher values even under As exposure. Apart from the negative effects of MV and AsIII on the photosynthetic rates and PSI! efficiency in rice leaves, taken together, these results indicate that AM is able to sustain higher rice photosynthesis efficiency even under elevated As concentrations, especially when As is present as MV. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/18097-5 - Root transcriptome profiling of membrane transporters in rice plants symbiotically associated with mycorrhizal fungi and in response to Arsenic
Grantee:Sara Adrian Lopez de Andrade
Support Opportunities: Research Grants - Young Investigators Grants