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Physico-chemical properties of longan fruit during development and ripening

文献类型： 外文期刊

作者： Shi, Shengyou 1 ; Wang, Wei 1 ; Liu, Liqin 1 ; Shu, Bo 1 ; Wei, Yongzan 1 ; Jue, Dengwei 1 ; Fu, Jiaxin; Xie, Jianghui 1 ;

作者机构： 1.CATAS, Inst China Southern Subtrop Crop Res, Key Lab Trop Fruit Biol, Minist Agr, Zhanjiang 524091, Guangdong, Peoples R China

2.Anhui Agr Univ, Prov Key Lab Plant Genet & Breeding, Sch Life Sci, 130 Changjiang West Rd, Hefei 230036, Anhui, Peoples R China;

关键词： Longan;Physico-chemical properties;Sugar accumulation;Carbohydrate- metabolizing enzyme activities

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

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收录情况： SCI

摘要： As a non-climacteric fruit, longan does not continue to ripen until harvest due to pericarp browning and aril breakdown. The patterns of fruit growth and changes in physico-chemical properties of longan fruits ('cv. Shixia') after post-anthesis (DPA) were investigated over two different year seasons, with the aim to identify a reliable maturity index for harvest. Fruit growth, based on fruit weight, volume and diameter, followed a smooth sigmoidal type of curve for eleven selected periods. Vc contents showed an ascending trend in aril. A similar variation was also demonstrated in the ratio of TSS/TA and activities of PPO and POD. However, MDA in aril showed less accumulation than that in pericarp, though the change trends of MDA were similar in both of tissues. By contrast, sucrose was the primary accumulated form in the later growth stage of longan fruit. Increases in the proportion of sucrose were associated with a decline of Al, NI, and SS-C activities and an increase of SPS activity approximately 70 DPA. Information on fruit morphology and physico-chemical properties is benefit for better understanding of the physiological maturity status of longan. Based on charateristics of different indexes, TSS/TA and sucrose contents revealed increasing trend with advancing maturity and reached the steady status during 100-110 DPA. So their indexes was applied to determine the physiological mature stage of fruits, that would present the optimum values of harvesting properties desirable in the investigated cultivar. It could contribute to assist growers in assessing fruit readiness for harvest. (C) 2016 Elsevier B.V. All rights reserved.

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