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Plant function and evolutionary biology
RESEARCH ARTICLE

Nitric oxide effectively orchestrates postharvest flower senescence: a case study of Consolida ajacis

Aehsan Ul Haq A , Mohammad Lateef Lone A , Sumira Farooq A , Shazia Parveen A , Foziya Altaf A , Inayatullah Tahir A * , Daniel Ingo Hefft https://orcid.org/0000-0002-0775-7538 B , Ajaz Ahmad C and Parvaiz Ahmad https://orcid.org/0000-0003-2734-4180 D E *
+ Author Affiliations
- Author Affiliations

A Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, Jammu and Kashmir 190006, India.

B University Centre Reaseheath, Food and Agricultural Sciences, Reaseheath College, Nantwich CW5 6DF, UK.

C Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.

D Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.

E Department of Botany, GDC Pulwama, Pulwama, Jammu and Kashmir, India.


Handling Editor: Suleyman Allakhverdiev

Functional Plant Biology - https://doi.org/10.1071/FP21241
Submitted: 11 August 2021  Accepted: 25 September 2021   Published online: 19 November 2021

© 2021 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Nitric oxide releasing compound sodium nitroprusside (SNP) is regarded as novel chemical to beat the daunting challenges of postharvest losses in cut flowers. In the recent years, it has yielded propitious results as postharvest vase preservative for cut flowers. Our study explicates the efficacy of SNP in mitigating postharvest senescence in Consolida ajacis (L.) Schur cut spikes. The freshly excised C. ajacis spikes were subjected to different SNP treatments viz, 20 μM, 40 μM, 60 μM and 80 μM. The control spikes were held in distilled water. The spikes held in test solutions showed a marked improvement in vase life and flower quality. Our results indicate a profound surge in sugars, phenols and soluble proteins in SNP-treated spikes over control. Moreover, the SNP treatments improved membrane stability as signposted by decreased lipoxygenase activity (LOX). The SNP treatments also upregulated different antioxidant enzymes viz, ascorbate peroxidase (APX), catalase (CAT) and superoxide dismutase (SOD). The current study recommends 40 μM SNP as optimum concentration for preserving floral quality and extending display period of C. ajacis spikes. Together, these findings reveal that SNP at proper dosage can efficiently alleviate deteriorative postharvest changes by modulating physiological and biochemical mechanisms underlying senescence.

Keywords: antioxidant enzymes, amino acids, bacterial density, lipoxygenase activity, phenols, proteins, sodium nitroprusside, sugars.


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