TY  - JOUR
T1  - Exogenous Nitric Oxide Negatively Impacts on Ethylene Emissions from Intact and Fresh-Cut Tomato Fruit
AU - Aboul-Soud, Mourad A.M. 
JO  - Research Journal of Biological Sciences
VL  - 5
IS  - 2
SP  - 209
EP  - 214
PY  - 2010
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2010.209.214
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2010.209.214
KW  - Tomato
KW  -nitric oxide
KW  -ethylene biosynthesis
KW  -laser photoacoustic spectroscopy
KW  -fresh-cut fruits
KW  -Saudi Arabia
AB  - The objective of this study was to investigate the effect of Nitric Oxide (NO) on the production of basal and wound-associated stress ethylene (C<SUB>2</SUB>H<SUB>4</SUB>) from intact and fresh-cut tomato fruits, respectively. For this purpose, a non-invasive and online sampling technique based on Laser Photoacoustic Spectroscopy (LPAS) was employed. Pre-treatment of intact Mature Green (MG) tomato fruits with a low concentration (200 ppbv) of NO gas resulted in a significant and steady average reduction of 33% in the basal-level C<SUB>2</SUB>H<SUB>4</SUB> production to 6.0&plusmn;0.44 pmol h<SUP>-1</SUP> g fwt<SUP>-1</SUP> compared to 9.0&plusmn;0.18 pmol h<SUP>-1</SUP> g fwt<SUP>-1</SUP> in the non-treated MG control. Moreover, NO gas fumigation of fresh-cut MG tomato fruit slices caused a 60% reduction in peak wound-induced C<SUB>2</SUB>H<SUB>4</SUB> levels compared to untreated fresh-cut control fruit. These results clearly indicate that NO pre-treatment negatively impacts on both basal and wound-associated stress C<SUB>2</SUB>H<SUB>4</SUB> emission levels, respectively in both intact and fresh-cut tomato fruits. These results are discussed in the light of possible mechanisms of NO interference with C<SUB>2</SUB>H<SUB>4</SUB> biosynthesis. Moreover, the potential utilization of NO in controlling stress-induced and undesirable biochemical changes which are known to occur in fresh-cut fruits is highlighted.
ER  -