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Journal of Integrative Agriculture
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Effects of 1-methylcyclopropene and modified atmosphere packaging on fruit quality and superficial scald in Yali pears during storage
FENG Yun-xiao, CHENG Yu-dou, HE Jin-gang, LI Li-mei, GUAN Jun-feng
2018, 17 (
07
): 1667-1675. DOI:
10.1016/S2095-3119(18)61940-9
Abstract
(
485
)
PDF in ScienceDirect
The Yali pear (
Pyrus bretschneideri
Rehd.) is susceptible to superficial scald during prolonged cold storage and at shelf life. This study investigated the effects of 1-methylcyclopropene (1-MCP) and modified atmosphere packaging (MAP) on changes of fruit quality and superficial scald during cold storage and at shelf life in Yali pear. Compared with MAP, the combination of MAP and 1-MCP (MAP+1-MCP) treatment reduced the carbon dioxide and ethylene content inside the packaging bag. The 1-MCP, MAP, and MAP+1-MCP treatments reduced the superficial scald index, malondialdehyde content, O2
–
· production rate and relative conductivity and inhibited the accumulation of α-farnesene and conjugated trienes in the peel. 1-MCP and MAP+1-MCP treatments maintained a higher phenolic content and enhanced the catalase and superoxide dismutase activities in the fruit, while reduced activities of lipoxygenase and polyphenol oxidase in the peel preceding the onset of superficial scald. Comprehensive analysis indicated that the MAP+1-MCP treatment is the most effective method tested for improving the quality of Yali pears during cold storage and at shelf life.
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Changes of chlorogenic acid content and its synthesis-associated genes expression in Xuehua pear fruit during development
HE Jin-gang, CHENG Yu-dou, GUAN Jun-feng, GE Wen-ya, ZHAO Zhe
2017, 16 (
02
): 471-477. DOI:
10.1016/S2095-3119(16)61496-X
Abstract
(
1046
)
PDF in ScienceDirect
According to synthetic pathway of plant chlorogenic acid (CGA), the expression patterns of genes encoding enzymes that are associated with CGA synthesis were studied in normally developed Xuehua pear fruit. The study demonstrated that CGA content in peel and flesh of Xuehua pear decreased as fruit development progressed, with a higher level in peel. The expression levels of
PbPAL1
,
PbPAL2
,
PbC3H
,
PbC4H
,
Pb4CL1
,
Pb4CL2
,
Pb4CL6
,
PbHCT1
and
PbHCT3
genes decreased in fruit, which was consistent with the pattern of variation in CGA content. That indicated that these genes might be key genes for influencing fruit CGA synthesis in Xuehua pear. However,
Pb4CL7
gene expression profile is not consistent with variation of CGA content, hence, it may not be a key gene involved in CGA synthesis.
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Effects of Nitric Oxide on the Quality and Pectin Metabolism of Yali Pears During Cold Storage
LIU Li-qin, DONG Yu, GUAN Jun-feng
2011, 10 (
7
): 1125-1133. DOI:
10.1016/S1671-2927(11)60102-8
Abstract
(
1579
)
PDF in ScienceDirect
The effect of fumigation with 10, 20, and 30 μL L-1 nitric oxide (NO) was investigated to study the effects of NO on thequality of Yali pears during cold storage. The ethylene production, composition of cell walls, and cell-wall-modifyingenzyme activities were measured on fruits which were fumigated with NO (20 μL L-1). The results showed that NO not onlyreduced the peak value of ethylene production rate, the soluble sugar, soluble solid content, maintained higher firmness,starch, and NO content, but also retarded the degradation of covalent soluble pectin, accumulation of ionic soluble pectinand water soluble pectin. Moreover, NO fumigation decreased the activities of polygalacturonase (PG) and â-galactosidase(â-Gal) and delayed the peak of PG activity of fruits. Therefore, it indicated that NO fumigation could delay the softeningand ripening of Yali pears.
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