Mechanism of foliar application of boron to alleviate cadmium toxicity in winter wheat (Triticum aestivum L.)

被引：3

作者：

Xie, Mengchan ^{[1
]}

Feng, Yifan ^{[1
]}

Zhao, Peng ^{[1
]}

Nie, Zhaojun ^{[1
]}

Liu, Hongen ^{[1
]}

Gao, Wei ^{[1
]}

Li, Chang ^{[1
]}

Sui, Fuqing ^{[1
]}

Wang, Long ^{[1
]}

Qin, Shiyu ^{[1
]}

机构：

[1] Henan Agr Univ, Coll Resources & Environm, Key Lab Soil Pollut & Remediat Henan Prov, Zhengzhou 450002, Peoples R China

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2024年 / 217卷

关键词：

Winter wheat; Boron; Cadmium; Foliar spray; Antioxidant enzymes; Gene expression; MINERAL NUTRIENTS; TOLERANCE; EXPRESSION; RESPONSES; SILICON; PLANTS; GENE;

D O I：

10.1016/j.plaphy.2024.109264

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Our previous work shown that boron (B) can inhibit cadmium (Cd) absorption in winter wheat, while the mechanism is not well understood. In this study, the mechanism of foliage spray B on Cd uptake in Cd-contaminated farmland was characterized with three treatments: spraying distilled water (CK), spraying 0.3% B fertilizer (F0.3%), and spraying 0.6% B fertilizer (F0.6%). The spraying treatment was conducted during the jointing stage and booting stage, respectively. The objective was to investigate the impact of different concentrations of B fertilizer application on Cd content, yield, physiological biochemical response, Cd transporter in wheat. Results showed that the yield increased with increasing B spray concentration compared with CK treatment. The wheat yield increased by 1.29%similar to 12.50% under foliar B application. The Cd concentration in both shoot and root of wheat seedlings were significantly decreased with foliar application of B at jointing stage and booting stage. The Cd concentrations in root and seed were also decreased with B treatment at maturity stage, especially after treatment with F0.6%, the Cd absorption in wheat grains exhibited a significant reduction of 31.20%. In addition, foliar application of B significantly increased antioxidant enzyme activities, include APX, SOD, CAT, and POD. Compared with CK, the MDA content in leaves showed a significant decrease with 30.48%-50.14%, while the GSH content showed an increase with 76.32%-1.05%. The down-regulation of the uptake and transport genes (TaNramp5 , TaLCT1 and TaHMA2) and the up-regulation of compartmentalization transport genes (TaTM20 and TaHMA3) may contribute to the reduction of Cd accumulation in shoot. Overall, our results suggest that foliar spraying of B could increase B accumulation and yield, and alleviate Cd toxicity by reducing Cd uptake, enhancing the antioxidant capacity, regulating the expression of Cd genes in wheat.

引用

页数：11