Exogenous γ-aminobutyric acid and Bacillus pumilus reduce arsenic uptake and toxicity in rice

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Dolphen, Rujira; Thiravetyan, Paitip

ผู้เผยแพร่: Springer

ปีที่เผยแพร่ (ค.ศ.): 2024

ชื่อย่อของวารสาร: Environ Sci Pollut Res

Volume number: 31

Issue number: 7

หน้าแรก: 10609

หน้าสุดท้าย: 10620

จำนวนหน้า: 12

นอก: 0944-1344

eISSN: 1614-7499

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184518613&doi=10.1007%2fs11356-024-31893-2&partnerID=40&md5=01111853bace15e82e3d52d1b6c90821

ภาษา: English-Great Britain (EN-GB)

ดูบนเว็บไซต์ของสำนักพิมพ์

บทคัดย่อ

In this study, the addition of γ-aminobutyric acid (GABA), Bacillus pumilus, or both, was found to enhance rice growth and yield while significantly decreasing arsenic (As) accumulation in Oryza sativa rice tissues. GABA emerged as a regulator of iron (Fe) homeostasis, acting as a signaling modulator that influenced phytosiderophore secretions in the plant. Meanwhile, B. pumilus directly increased Fe levels through siderophore production, promoting the development of Fe-rich rice plants. Subsequently, Fe competed with As uptake at the root surface, leading to decreased As levels and translocation to the grains. Furthermore, the addition of GABA and B. pumilus optimized rice indole-3 acetic acid (IAA) contents, thereby adjusting cell metabolite balance under As stress. This adjustment results in low malondialdehyde (MDA) contents in the leaves and roots during the early and late vegetative phases, effectively reducing oxidative stress. When added to As-contaminated soil, GABA and B. pumilus effectively maintained endogenous GABA levels and exhibited low ROS generation, similar to normal soil. Concurrently, GABA and B. pumilus significantly downregulated the activity of OsLsi1, OsLsi2, and OsABCC1 in roots, reducing As uptake through roots, shoots, and grains, respectively. These findings suggest that GABA and B. pumilus additions impede As translocation through grains, ultimately enhancing rice productivity under As stress. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

คำสำคัญ

Arsenic-contaminated soil, Iron