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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. SantaRosa shows climacteric behaviour and grows profitably under sub-temperateconditions in India. After ripening, it has a very limited shelflife (3–4 days) in ambient conditions [(38 ± 2) °C and at (68 ± 4)%RH]. Hence, there is an urgent need to extend its marketabilityusing recent techniques. Materials and methods. Plumswere harvested at the pre-climacteric and climacteric stages ofmaturity and packed with newspaper shreds (control), KMnO4-impregnatedchalks, KMnO4-impregnated newspaper shreds or ethylene-absorbent sachets;then they were transported by road to New Delhi. The biochemicaland physiological analyses were carried out at 3-day intervals onplums stored in supermarket conditions [(20 ± 1) °C and at (90 ± 2)%RH] for 15 days. Results and discussion. Untreatedfruits had less firmness than those which were packed with ethyleneabsorbents. The activities of fruit-softening enzymes such as lipoxygenase(LOX), polygalacturonase (PG) and pectin methylesterase (PME) increasedrapidly in the control treatment in comparison with plums packed withvarious ethylene absorbents, the least being either with ethylene-absorbentsachets or with KMnO4-impregnated newspaper shreds. Plums of pre-climacteric andclimacteric maturity attained respiration and ethylene evolutionpeaks on the 9th day and 6th day, respectively. Conclusions. Theplums of pre-climacteric and climacteric stages of maturity packed withethylene-absorbent sachets showed the best results in supermarketconditions in maintaining the firmness, quality and shelf life ofplum 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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