H2O2 alleviates salt stress effects on photochemical efficiency and photosynthetic pigments of cotton genotypes

被引：13
|
作者：
Veloso, Luana L. de S. A. [1 ,2 ]
de Azevedo, Carlos A., V [1 ,2 ]
Nobre, Reginaldo G. [1 ,3 ]
de Lima, Geovani S. [1 ,4 ]
Capitulino, Jessica D. [1 ,2 ]
da Silva, Francisco de A. [1 ,2 ]
机构：
[1] Univ Fed Campina Grande, Ctr Ciencias Recursos Nat, Campina Grande, Paraiba, Brazil
[2] Univ Fed Campina Grande, Programa Posgrad Engn Agr, Campina Grande, Paraiba, Brazil
[3] Univ Fed Rural Semi Arido, Dept Ciencias & Tecnol, Caraubas, RN, Brazil
[4] Univ Fed Campina Grande, Unidade Acad Ciencias Agr, Pombal, PB, Brazil
来源：
REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL | 2023年 / 27卷 / 01期
关键词：
Gossypium hirsutum L; salinity; acclimatization; hydrogen peroxide; MANAGEMENT; TOLERANCE; QUALITY; GROWTH; PLANTS;
D O I：
10.1590/1807-1929/agriambi.v27n1p34-41
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The objective of this study was to evaluate the quantum yield and concentrations of photosynthetic pigments of naturally colored cotton genotypes under irrigation with waters of different electrical conductivities and foliar applications of hydrogen peroxide. The design used was randomized blocks in a 4 x 3 x 2 factorial arrangement, corresponding to four concentrations of hydrogen peroxide - H2O2 (0, 25, 50 and 75 mu M), three genotypes of colored fiber cotton ('BRS Rubi, 'BRS Topazio' and 'BRS Verde') and two values of electrical conductivity of water (0.8 and 5.3 dS m(-1)), with three replicates. Irrigation with water of 5.3 dS m(-1) reduces the chlorophyll a, chlorophyll b and total chlorophyll concentrations of 'BRS Rubi' cotton. The concentrations of photosynthetic pigments, maximum fluorescence, variable fluorescence and quantum efficiency of photosystem II of 'BRS Rubi' cotton increased under irrigation with 0.8 dS m(-1) water and foliar application of 50 mu M of hydrogen peroxide. Water of 5.3 dS m(-1) and foliar applications of 75 mu M of hydrogen peroxide reduce the concentrations of photosynthetic pigments, but did not cause damage to the efficiency of photosystem II of the colored cotton genotypes.
引用
收藏
页码：34 / 41
页数：8
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