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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Leaf succulent halophytes and xerohalophytes are predominantly C4.
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These unusual population patterns may explain the unique structure of leaf succulent-dominated communities in the Succulent Karoo.
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Detailed observations on the four dominant leaf succulent shrubs (all members of the Mesembryanthemaceae) between 1983 and 1996, showed species-specific patterns in population turnover.
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Numbers of individuals of evergreen, leaf succulent shrubs also doubled over the same period, but showed fluctuations in response to dry years during the monitoring period.
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Remarkable medium-term dynamics of leaf succulent Mesembryanthemaceae shrubs in the winter-rainfall desert of northwestern Namaq
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| | The experiments on introduction and plantation were carried out inShapotou area.The survival rate,preserval rate and the characteristics of thegrowth of plant were observed,and some best sand-stablizing plant specieswith higher resistant ability and adaptability were selected.On this basis,the mechanism of drought-resistance of these plant species was detailly studiedby electric microscope and some analytic methods on the aspect of plantphysiology.Doing so,the scientific evidences on the nature of biology a... | | 我们在沙坡头地区进行了引种栽植试验,选择出抗逆性及适应性较强的优良固沙植物种,并运用电子显微镜及一些分析手段,研究它们的抗旱机理。据研究,在形态结构方面,旱生型肉质植物红砂、沙拐枣,叶表皮覆盖有蜡质且细胞壁和角质层较厚,气孔下陷。旱生型的柠条、猫头刺、叶形变小,叶表面被稠密的灰白色的绒毛所覆盖,借以掩盖气孔,减少蒸腾,使叶肉组织免于灼伤。在生理特性方面,这些旱生型植物细胞的原生质粘滞性较高,弹性强,透性大,抗脱水能力强,抗热性好,蒸腾强度小,过氧化氢酶的活性强,可溶性糖的含量高,束缚水含量多,束缚水与自由水的比值大等,从而构成耐干旱的特性。 | | 文摘来源 | |   |
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