MERCURY AFFECTS AQUAPORINS ACTIVITY AND GERMINATION OF THE EMBRYONIC AXIS OF Schizolobium parahyba (Vell.) BLAKE (Fabaceae)

被引：2
|
作者：
Magistrali, Paulo Roberto [1 ]
de Lima e Borges, Eduardo Euclydes [2 ]
de Oliveira, Juraci Alves [3 ]
Rocha Faria, Jose Marcio [4 ]
Ataide, Glauciana da Mata [5 ]
do Nascimento, Janice Ferreira [6 ]
机构：
[1] Univ Fed Vicosa, Ciencia Florestal, Vicosa, MG, Brazil
[2] Univ Fed Vicosa, Dept Engn Florestal, Vicosa, MG, Brazil
[3] Univ Fed Vicosa, Dept Biol Geral, Vicosa, MG, Brazil
[4] Univ Fed Lavras, Dept Ciencias Florestais, Lavras, MG, Brazil
[5] Univ Fed Sao Joao Del Rei, Dept Engn Florestal, Sete Lagoas, MG, Brazil
[6] Inst Fed Educ Ciencia & Tecnol Rondonia, Ji Parana, RO, Brazil
来源：
REVISTA ARVORE | 2019年 / 43卷 / 06期
关键词：
Aquaporins; Heavy metal; Forest seed; WATER-UPTAKE; STRESS; INHIBITION; EXPRESSION; RESISTANCE; CHANNELS; PROTEIN; GROWTH; SEEDS;
D O I：
10.1590/1806-90882019000600001
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
Germination is a physiological process that begins with hydration. Specific channels known as aquaporins are responsible for water uptake through biological cell membranes. The mercuric chloride (HgCl2) reversibly inhibits water transport during germination through the aquaporins and can changes deoxyribonucleic acid (DNA) integrity, which can result in aquaporins deficiency. The aim of this study was to evaluate the effect of HgCl(2 )and dithiothreitol (DTT) on aquaporins activity and on the integrity/degradation of DNA in embryonic axes of Schizolobium parahyba (Vell.) Blake during the germination process. Isolated axes were exposed to different concentrations of HgCl2 or DTT; and aquaporins activity, embryo hydration, and DNA integrity were evaluated during embryonic axes imbibition. Growth and changes in axis fresh weight were quantified. We found that the heavy metal affects seed hydration by inhibition of aquaporins activity and does not cause changes in DNA integrity.
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页数：10
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