Effect of Gibberellic Acid Treatment on Quality and Physiology of Two Grape Varieties During Cold Storage

Abstract

Abstract: We examined the effect on quality and storage physiology of preharvest applications of Gibberellic Acid (GA3) , on ‘Redglobe’ and ‘Crimson Seedless’ grapes (Vitis vinifera).The respiration intensity, firmness, titratable acidity, soluble solids content, decay rate, shatter index and MDA content of the grapes were investigated during storage. The results showed that 30mg?L-1 GA3 treatment increased the main fruit quality parameters, including berry weight and cluster weight, Compared with untreated grape, berry weight of grape treated increased 29.33% and 32.30% ,cluster weight of grape treated increased 49.71% and 33.36% ,on ‘Redglobe’ and Crimson Seedless , respectively. During the cold storage, the losses due to fruit decay and cluster shatter were reduced compared with control, and respiration intensity of grape treated were inhihibited. Meanwhile, higher firmness remained in grapes of treated group than in the control ,the loss of titritable acids was reduced in Grape treated. We found that GA3 treatment evidently delayed the increase of MDA content，and kept integrity of membrane.

CLC Number:

S609.3

References

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