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Ethylene absorbents influence fruit firmnessand activity of enzymes involved in fruit softening of Japaneseplum (Prunus salicina Lindell) cv. Santa Rosa

Published online by Cambridge University Press:  28 June 2012

Swati Sharma ,
Ram Roshan Sharma ,
Ram Krishna Pal ,
Md. Jameel Jhalegar ,
Jagvir Singh ,
Manish Srivastav  and
Mast Ram Dhiman
Swati Sharma
Affiliation:
Div. Post Harvest Technol., Indian Agric. Res. Inst., New Delhi, 110 012, India. rrs_fht@rediffmail.com
Ram Roshan Sharma*
Affiliation:
Div. Post Harvest Technol., Indian Agric. Res. Inst., New Delhi, 110 012, India. rrs_fht@rediffmail.com
Ram Krishna Pal
Affiliation:
Div. Post Harvest Technol., Indian Agric. Res. Inst., New Delhi, 110 012, India. rrs_fht@rediffmail.com
Md. Jameel Jhalegar
Affiliation:
Div. Post Harvest Technol., Indian Agric. Res. Inst., New Delhi, 110 012, India. rrs_fht@rediffmail.com
Jagvir Singh
Affiliation:
Div. Post Harvest Technol., Indian Agric. Res. Inst., New Delhi, 110 012, India. rrs_fht@rediffmail.com
Manish Srivastav
Affiliation:
Div. Fruits Hortic. Technol., IARI, New Delhi, India
Mast Ram Dhiman
Affiliation:
IARI Reg. Stn., Katrain (Himachal Pradesh), India
*
* Correspondence and reprints
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Abstract

Introduction. Plum cv. Santa Rosa shows climacteric behaviour and grows profitably under sub-temperate conditions in India. After ripening, it has a very limited shelf life (3–4 days) in ambient conditions [(38 ± 2) °C and at (68 ± 4)% RH]. Hence, there is an urgent need to extend its marketability using recent techniques. Materials and methods. Plums were harvested at the pre-climacteric and climacteric stages of maturity and packed with newspaper shreds (control), KMnO4-impregnated chalks, KMnO4-impregnated newspaper shreds or ethylene-absorbent sachets; then they were transported by road to New Delhi. The biochemical and physiological analyses were carried out at 3-day intervals on plums stored in supermarket conditions [(20 ± 1) °C and at (90 ± 2)% RH] for 15 days. Results and discussion. Untreated fruits had less firmness than those which were packed with ethylene absorbents. The activities of fruit-softening enzymes such as lipoxygenase (LOX), polygalacturonase (PG) and pectin methylesterase (PME) increased rapidly in the control treatment in comparison with plums packed with various ethylene absorbents, the least being either with ethylene-absorbent sachets or with KMnO4-impregnated newspaper shreds. Plums of pre-climacteric and climacteric maturity attained respiration and ethylene evolution peaks on the 9th day and 6th day, respectively. Conclusions. The plums of pre-climacteric and climacteric stages of maturity packed with ethylene-absorbent sachets showed the best results in supermarket conditions in maintaining the firmness, quality and shelf life of plum up to the 12th day and 9th day of storage, respectively.

Keywords

IndiaPrunus salicinafruitskeeping qualityfirmnessethylene productionpostharvest physiologyenzyme activitylipoxygenasepolygalacturonaseesterasesIndePrunus salicinafruitsaptitude à la conservationfermetéphysiologie après récolteactivité enzymatiquelipoxygénasepolygalacturonaseestéraseIndiaPrunus salicinafrutasaptitud para la conservaciónfirmezaproducción de etilenofisiología postcosechaactividad enzimáticalipoxigenasapoligalacturonasaesterasas
Type
Original article
Information
Fruits , Volume 67 , Issue 4 , July 2012 , pp. 257 - 266
Copyright
© 2012 Cirad/EDP Sciences

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