Abstract
Diazocyclopentadiene (DACP), an inhibitor of ethylene action, was used to investigate the role of ethylene receptor(s) in regulating ethylene biosynthesis and respiration in strawberry fruit. DACP stimulated ethylene production of fruit at all stages of maturity. This stimulation was mainly due to an increase in ACC content in the tissue without significantly changing ACC oxidase activity. DACP did not induce any change in respiration in fruit at various stages of maturity except the early green stage (green I). We also investigated the possible interaction of DACP and IAA in ethylene production. Results indicated that all treatments increased ethylene production compared to the control although the absolute ethylene production differed in the order IAA plus DACP > only DACP > only IAA > control. IAA stimulated ethylene production without change of ACC oxidase activity at 1 day after treatment in strawberry fruit at pink stage. Results suggest that ethylene biosynthesis in nonclimacteric strawberry fruit at various stages of maturity may be regulated by ethylene receptor(s) with inhibition of ethylene production. DACP may release this inhibitory effect, and resulting in increasing ethylene production. Results also indicated that respiration may not be regulated by an ethylene receptor in strawberry fruit at most stages of maturity. DACP and IAA showed interaction in regulation of ethylene production which was caused by an increase in ACC content, not ACC oxidase activity.
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Tian, M., Gong, Y. & Bauchot, A. Ethylene biosynthesis and respiration in strawberry fruit treated with diazocyclopentadiene and IAA. Plant Growth Regulation 23, 195–200 (1997). https://doi.org/10.1023/A:1005991314321
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DOI: https://doi.org/10.1023/A:1005991314321