Physiological and metabolic changes in response to Boron levels are mediated by ethylene affecting tomato fruit yield.

Autor: Pereira GL; National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil., Nascimento VL; Setor de Fisiologia Vegetal - Departamento de Biologia, Universidade Federal de Lavras, 37200-900, Lavras, Minas Gerais, Brazil., Omena-Garcia RP; National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil., Souza BCOQ; Setor de Fisiologia Vegetal - Departamento de Biologia, Universidade Federal de Lavras, 37200-900, Lavras, Minas Gerais, Brazil., Gonçalves JFC; National Institute for Amazon Research (INPA), Laboratory of Plant Physiology and Biochemistry, Av. André Araújo, 2936, Aleixo, Manaus-AM, Brazil., Ribeiro DM; National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil., Nunes-Nesi A; National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil., Araújo WL; National Institute of Science and Technology on Plant Physiology Under Stress Conditions, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900, Viçosa, Minas Gerais, Brazil. Electronic address: wlaraujo@ufv.br.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2023 Sep; Vol. 202, pp. 107994. Date of Electronic Publication: 2023 Aug 30.
DOI: 10.1016/j.plaphy.2023.107994
Abstrakt: Boron (B) is an essential nutrient for the plant, and its stress (both deficiency and toxicity) are major problems that affect crop production. Ethylene metabolism (both signaling and production) is important to plants' differently responding to nutrient availability. To better understand the connections between B and ethylene, here we investigate the function of ethylene in the responses of tomato (Solanum lycopersicum) plants to B stress (deficiency, 0 μM and toxicity, 640 μM), using ethylene related mutants, namely nonripening (nor), ripening-inhibitor (rin), never ripe (Nr), and epinastic (Epi). Our results show that B stress does not necessarily inhibit plant growth, but both B stress and ethylene signaling severely affected physiological parameters, such as photosynthesis, stomatal conductance, and chlorophyll a fluorescence. Under B toxicity, visible symptoms of toxicity appeared in the roots and margins of the older leaves through necrosis, caused by the accumulation of B which stimulated ethylene biosynthesis in the shoots. Both nor and rin (ethylene signaling) mutants presented similar responses, being these genotypes more sensitive and displaying several morphophysiological alterations, including fruit productivity reductions, in response to the B toxicity conditions. Therefore, our results suggest that physiological and metabolic changes in response to B fluctuations are likely mediated by ethylene signaling.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:WAGNER L. ARAUJO reports administrative support, equipment, drugs, or supplies, travel, and writing assistance were provided by Minas Gerais State Foundation of Support to the Research.
(Copyright © 2023 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
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