DESICCATION TOLERANT VASCULAR PLANTS OF SOUTHERN-AFRICA
DESICCATION TOLERANT VASCULAR PLANTS OF SOUTHERN-AFRICA
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DOI：
10.1007/bf00348713
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发表时间：
1977-01-01
期刊：
影响因子：
2.7
通讯作者：
GAFF, DF
中科院分区：
文献类型：
--
作者：
GAFF, DF
对36种新的复活植物给出了耐旱限度，足以使非洲南部报告的耐旱植物数量增加一倍。被子植物的耐受性极限通常比蕨类植物好。风干叶存活1/2至5年或更长时间，除非储存在湿度高于50% RH。脱水足够缓慢（通常2-3天），从而有可能产生耐受性诱导过程，就像在肉芽孢杆菌中发现的那样。雨后补水通常在1/2到1天内完成。很大一部分雨水是通过叶片表面吸收的，但没有证据表明露水有明显的再水化作用。复活植物通常是旱生植物的先驱，但它们通常缺乏旱生特征。干燥过程中的花青素色素沉着是一些物种生存能力的可靠指标。
Drought tolerance limits are given for 36 new resurrection plants, sufficient to double the number of desiccation tolerant plants reported from southern Africa. Tolerance limits for angiosperm examples are usually better than those for ferns. Air-dry foliage survives for 1/2 to 5 yr or more, unless stored in humidities above 50% RH. Dehydration is sufficiently slow (usually 2-3 days) to allow the possibility of a tolerance induction process, like that found in Borya nitida. Rehydration after rain is usually complete in 1/2 to 1 day. A significant proportion of rain is absorbed through the leaf surface, but there is no evidence of appreciable rehydration from dew. Resurrection plants are usually pioneers in xeroseres, but they often lack xeromorphic characteristics. Anthocyanin pigmentation during drying is a reliable indicator of viability in some species.