Nitric oxide counters ethylene effects on ripening fruits

Girigowda Manjunatha, Kapuganti J. Gupta, Veeresh Lokesh, Luis A J Mur, Bhagyalakshmi Neelwarne

Research output: Contribution to journalArticlepeer-review

90 Citations (SciVal)


Ethylene plays a key role in promoting fruit ripening, so altering its biosynthesis/signaling could be an important means to delay this process. Nitric oxide (NO)-generated signals are now being shown to regulate ethylene pathways. NO signals have been shown to transcriptionally repress the expression of genes involved in ethylene biosynthesis enzymes and post-translationally modify methionine adenosyl transferase (MAT) activity through S-nitrosylation to reduce the availably of methyl groups required to produce ethylene. Additionally, NO cross-talks with plant hormones and other signal molecules and act to orchestrate the suppression of ethylene effects by modulating enzymes/proteins that are generally triggered by ethylene signaling at post-climacteric stage. Thus, medication of endogenous NO production is suggested as a strategy to postpone the climacteric stage of many tropical fruits.
Original languageEnglish
Pages (from-to)476-483
Number of pages8
JournalPlant Signaling and Behavior
Issue number4
Publication statusPublished - Apr 2012


  • ethylene
  • fruit ripening
  • nitric oxide
  • reactive oxygen species


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