Ripening Characteristics and Pigment Changes in Russeted Pear Fruit in Response to Ethylene and 1-MCP
Ripening Characteristics and Pigment Changes in Russeted Pear Fruit in Response to Ethylene and 1-MCP
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DOI：
10.3390/horticulturae4030022
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发表时间：
2018-09-01
期刊：
影响因子：
3.1
通讯作者：
Murayama, Hideki
中科院分区：
文献类型：
--
作者：
Charoenchongsuk, Nongluk;Matsumoto, Daiki;Murayama, Hideki
研究了“La France”、“Gorham”及其黄褐色体育品种“Gold La France”和“Grand Champion”梨的成熟特性和色素变化。在商业成熟时收获果实并在20 ℃下成熟。在所有品种中，果实软化伴随着乙烯产生的爆发。有趣的是，这种变化被推迟在赤梨相比，他们的野生型。收获时赤梨的叶绿素水平与野生型相同。在'戈勒姆'和'大冠军'梨，其水平迅速下降，在成熟过程中。乙烯或1-甲基环丙烯（1-MCP）不影响“法国”和“黄金法国”梨的颜色和色素。相反，在'戈勒姆'和'大冠军'梨，叶绿素降解抑制1-MCP处理，但不完全。这些结果表明，叶绿素降解受乙烯依赖和乙烯非依赖的手段。乙烯对叶绿素降解相关基因表达的影响在赤褐色和野生型中似乎是相似的。Stay绿色-1基因受乙烯的刺激而受到1-MCP的抑制。与此相反，乙烯或1-MCP的影响不大，叶绿素酶1，脱镁叶绿素酶，脱镁叶绿酸加氧酶，NYC 1样基因。
Ripening characteristics and pigment changes were investigated in 'La France', 'Gorham', and their russeted sports 'Gold La France' and 'Grand Champion' pears. Fruit were harvested at commercial maturity and ripened at 20 degrees C. In all cultivars, fruit softening was concomitant with a burst in ethylene production. Interestingly, such changes were delayed in russet pear when compared with their wild-types. Chlorophyll level in russet pear at harvest was the same as in the wild-type. In 'Gorham' and 'Grand Champion' pears, its level rapidly decreased during ripening. Ethylene or 1-methylcyclopropene (1-MCP) did not affect the color and pigments in 'La France' and 'Gold La France' pears. In contrast, in 'Gorham' and 'Grand Champion' pears, chlorophyll degradation was suppressed by 1-MCP treatment, but not completely. These results suggested that chlorophyll degradation was regulated by both ethylene-dependent and ethylene-independent means. The influence of ethylene on the expression of chlorophyll-degradation-related genes seemed to be similar in both russet and wild-type. The Stay green-1 gene was stimulated by ethylene and suppressed by 1-MCP treatment. In contrast, little effect of ethylene or 1-MCP was observed on chlorophyllase 1, pheophytinase, pheophorbide a oxygenase, and NYC1-like genes.