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Auxin-jasmonate crosstalk in Oryza sativa L. root system formation after cadmium and/or arsenic exposure

Ronzan, M.; Piacentini, D.; Fattorini, L.; Federica, D. R.; Caboni, E.; Eiche, E.; Ziegler, J.; Hause, B.; Riemann, M.; Betti, C.; Altamura, M. M.; Falasca, G.

Abstract:
Soil pollutants may affect root growth through interactions among phytohormones like auxin and jasmonates. Rice is frequently grown in paddy fields contaminated by cadmium and arsenic, but the effects of these pollutants on jasmonates/auxin crosstalk during adventitious and lateral roots formation are widely unknown. Therefore, seedlings of Oryza sativa cv. Nihonmasari and of the jasmonate-biosynthetic mutant coleoptile photomorphogenesis2 were exposed to cadmium and/or arsenic, and/or jasmonic acid methyl ester, and then analysed through morphological, histochemical, biochemical and molecular approaches. In both genotypes, arsenic and cadmium accumulated in roots more than shoots. In the roots, arsenic levels were more than twice higher than cadmium levels, either when arsenic was applied alone, or combined with cadmium. Pollutants reduced lateral root density in the wild -type in every treatment condition, but jasmonic acid methyl ester increased it when combined with each pollutant. Interestingly, exposure to cadmium and/or arsenic did not change lateral root density in the mutant. The transcript levels of OsASA2 and OsYUCCA2, auxin biosynthetic genes, increased in the wild-type and mutant roots when pollutants and jasmonic acid methyl ester were applied alone. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000095838
Veröffentlicht am 26.06.2019
Originalveröffentlichung
DOI: 10.1016/j.envexpbot.2019.05.013
Coverbild
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Botanisches Institut (BOTANIK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 0098-8472, 1873-7307
KITopen-ID: 1000095838
Erschienen in Environmental and experimental botany
Band 165
Seiten 59-69
Schlagworte Arsenic, Auxin, Cadmium, cpm2 mutant, Jasmonates, Malondialdehyde, Oryza sativa, Root development
Nachgewiesen in Scopus
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