Nitric oxide functions upstream of hydrogen sulfide in strigolactones-triggered stomatal closure in Arabidopsis thaliana (L.) Heynh

Authors

  • Yinli Ma College of Life Sciences, Shanxi Normal University, Taiyuan 030000, People’s Republic of China
  • Zhenyu Zhao College of Life Sciences, Shanxi Normal University, Taiyuan 030000, People’s Republic of China
  • Xianju Li College of Life Sciences, Shanxi Normal University, Taiyuan 030000, People’s Republic of China
  • Shuangshuang Liang College of Life Sciences, Shanxi Normal University, Taiyuan 030000, People’s Republic of China
  • Liuxi Wang College of Life Sciences, Shanxi Normal University, Taiyuan 030000, People’s Republic of China

DOI:

https://doi.org/10.3329/bjb.v54i4.86568

Keywords:

Strigolactones, Hydrogen sulfide, Nitric oxide, Stomatal closure

Abstract

Strigolactones (SLs)-induced stomatal closure involves nitric oxide (NO) and hydrogen sulfide (H2S) in Arabidopsis thaliana (L.) heynh. H2S synthesis inhibitors and NO modulators prohibited SL-triggered stomatal closure. SL caused stomatal closure of nia2-1 mutant, but failed to close stomata of Atl-cdes, Atd-cdes, nia1-2, nia1-2/nia2-5 and Atnoa1 mutants. SL induced NO production in wild-type and nia2-1 mutant, but not in Atnoa1, nia1-2 and nia1-2/nia2-5 mutants, NO modulators inhibited the effects induced by SL in wild-type. Furthermore, SL promoted H2S synthesis and L-/D-CDes activity in wild-type and nia2-1 mutant, NO modulators prevented the effects induced by SL in wild-type. The induction of H2S synthesis and L-/D-CDes activity by SL was abolished in Atnoa1, nia1-2 and nia1-2/nia2-5 mutants. However, H2S synthesis inhibitors could not inhibit SL-induced NO production in wild-type, Atl-cdes and Atd-cdes mutants exhibited normal NO levels in guard cells. The results suggested that NO functioned upstream of H2S synthesis in SLs-triggerred stomatal closure in A. thaliana.

Bangladesh J. Bot. 54(4): 949-956, 2025 (December)

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Published

2025-12-30

How to Cite

Ma, Y., Zhao, Z., Li, X., Liang, S., & Wang, L. (2025). Nitric oxide functions upstream of hydrogen sulfide in strigolactones-triggered stomatal closure in Arabidopsis thaliana (L.) Heynh. Bangladesh Journal of Botany, 54(4), 949–956. https://doi.org/10.3329/bjb.v54i4.86568

Issue

Vol. 54 No. 4 (2025)

Section

Articles

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© Bangladesh Botanical Society

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