A comparison of the ultrastructure and composition of fruits' cuticular wax from the wild-type 'Newhall' navel orange (Citrus sinensis [L.] Osbeck cv. Newhall) and its glossy mutant
A comparison of the ultrastructure and composition of fruits' cuticular wax from the wild-type 'Newhall' navel orange (Citrus sinensis [L.] Osbeck cv. Newhall) and its glossy mutant
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野生型纽荷尔脐橙（Citrus sinensis [L.] Osbeck cv. Newhall）及其光泽突变体果实角质层蜡的超微结构和成分比较
DOI：
10.1007/s00299-012-1333-x
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发表时间：
2012-12-01
影响因子：
6.2
通讯作者：
Liu, Yong
中科院分区：
文献类型：
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作者：
Liu, De-Chun;Zeng, Qiong;Liu, Yong
‘纽荷尔’(MT)果实角质蜡的超微结构和组成发生了变化，导致其表型光滑。奥斯贝克cv.纽荷尔)，命名为‘光泽纽荷尔’(MT)，它的果实更有光泽，很容易与WT水果区分开来。在果实发育过程中，WT和MT果实的总蜡量变化较大。成熟果实中蜡质含量最丰富的是三萜类化合物，其次是醛、烷烃、脂肪酸、伯醇和胆固醇。MT成熟果实的总含蜡量比对照降低了44.2%。除原醇和胆固醇中的少量蜡质组分外，MT成熟果实中主要蜡质组分的含量均有不同程度的下降。减少的主要成分是醛和烷烃，分别减少了96.4%和81.9%，这与MT成熟果实表面的扫描电子显微镜所显示的蜡晶严重丢失相一致。因此，醛和烷烃被认为是纽荷尔脐橙果实蜡晶形成所必需的。
The altered ultrastructure and composition of cuticular wax from 'glossy Newhall' (MT) fruits lead to its glossy phenotype.A novel mutant derived from the wild-type (WT) 'Newhall' navel orange (Citrus sinensis [L.] Osbeck cv. Newhall), named 'glossy Newhall' (MT), which produced much more glossy fruits that were easily distinguishable from the WT fruits was characterized in this report. The total wax loads of both WT and MT fruits varied considerably during the fruit development. The most abundant wax fraction of WT mature fruits was triterpenoids, followed by aldehydes, alkanes, fatty acids, primary alcohol and cholesterol. The total wax load in MT mature fruits was reduced by 44.2 % compared with WT. Except for the minor wax components of primary alcohol and cholesterol, the amounts of all major wax fractions in MT mature fruits were decreased in varying degrees. The major reduction occurred in aldehydes that decreased 96.4 % and alkanes that decreased 81.9 %, which was consistent with scanning electron micrographs of MT mature fruit surfaces that showed a severe loss of wax crystals. Hence, aldehydes and alkanes were suggested to be required for wax crystal formation in 'Newhall' navel orange fruits.