首页> 外文期刊>HortScience >The role of net development as a barrier to moisture loss in netted melon fruit (Cucumis melo L.).
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The role of net development as a barrier to moisture loss in netted melon fruit (Cucumis melo L.).

机译:净发育对网状瓜果(Cucumis melo L.)水分流失的阻碍作用。

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摘要

The transpiration rate of cuticular membrane and fissures that comprise the netting on fruits of three netted melon cultivars, Life, Andesu, and Gurandoru, were measured during fruit development. Fissures in the equatorial region first developed vertically, then became interconnected by horizontal fissures as the fruit developed. Some cracks remained along the net, even at the fruit ripening stage, regardless of cultivar. Both lignified and suberized cell wall layers in the net tissues of the cultivar Life were thinner than those of the other cultivars, probably because of the shorter developmental period of fruits in the variety. Nevertheless, net transpiration rate did not differ significantly among cultivars at the fruit ripening stage. Peroxidase (POD) activity in the skin tissues of "Life" was lower than that in "Andesu" and "Gurandoru" throughout fruit development and was not correlated with climacteric ethylene production. Among these cultivars, significantly higher ethylene production occurred in "Life" fruit at the ripening stage. This can accelerate membrane permeability of hypodermal tissues, resulting in rapid fruit softening. Our results indicate that the net tissues of netted melons can be as waterproof as cutinized membranes if suberized cell wall layers with wax depositions develop below the net fissures at the fruit ripening stage.
机译:在果实发育过程中测量了三个网状甜瓜品种Life,Andesu和Gurandoru的果实表皮的表皮膜和裂隙的蒸腾速率。赤道区域的裂隙首先垂直发育,然后随着果实发育而与水平裂隙相互联系。不论栽培品种如何,即使在果实成熟阶段,沿网的一些裂缝仍然存在。品种生活的净组织中木质化和干化的细胞壁层都比其他品种薄,这可能是因为该品种的果实发育期较短。然而,在果实成熟阶段,不同品种的净蒸腾速率没有显着差异。在整个果实发育过程中,“生命”皮肤组织中的过氧化物酶(POD)活性低于“安第素”和“瓜兰多鲁”中的过氧化物酶活性,并且与更年期乙烯的产量无关。在这些品种中,成熟期的“生命”果实中产生的乙烯产量明显更高。这可以加速皮下组织的膜通透性,从而导致果实快速软化。我们的结果表明,在果实成熟阶段,如果带有蜡质沉积物的干化细胞壁层在网状裂隙下方发育,则网状瓜的净组织可以像角质化膜一样防水。

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