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首页> 外文期刊>Australian Systematic Botany >Threats to the survival of the Grampians pincushion lily (Borya mirabilis, Liliaceae) - a short-range endemic from western Victoria
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Threats to the survival of the Grampians pincushion lily (Borya mirabilis, Liliaceae) - a short-range endemic from western Victoria

机译：对Grampians枕形百合（Borya mirabilis，百合科）生存的威胁-来自维多利亚州西部的一种短距离流行病

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摘要

The Grampians pincushion lily (Borya mirabilis Churchill) is a resurrection plant confined to one population at a single rock outcrop in western Victoria. It is a taxonomically well-defined species and geographically widely separated from its most closely related congeners in the south-west of Western Australia. Monitoring over a 12-month period showed a significant decline in population condition that was associated with soil disturbance and damage to associated vegetation. Although able to reproduce vegetatively, B. mirabilis is not known to produce viable seed. Molecular work revealed that all plants in the population were likely to be genetically identical. Investigation of the breeding system showed that pollen viability was low and pollen tube growth was possibly insufficient to fertilise ovules. One explanation for lack of effective sexual reproduction is the presence of a mechanism for self-incompatibility. The decline in population condition and lack of ramet establishment at present are predominantly a result of high levels of ground disturbance from pest animals. Without active and immediate site management the population is likely to become extinct under current circumstances.
机译：格兰屏枕形百合（Borya mirabilis Churchill）是一种复活植物，仅在维多利亚州西部的一个单一岩石露头中被限制在一个种群中。它是一个分类学上明确定义的物种，在地理上与西澳大利亚州西南部与其最密切相关的同类物种相距较远。在12个月的时间内进行的监测显示，人口状况显着下降，这与土壤扰动和相关植被的破坏有关。尽管能够进行营养繁殖，但不知道奇异芽孢杆菌能产生有活力的种子。分子工作表明，种群中的所有植物在基因上都可能是相同的。对繁殖系统的研究表明，花粉活力低，花粉管的生长可能不足以使胚珠受精。缺乏有效的性繁殖的一种解释是存在自我不相容的机制。目前人口状况的下降和缺乏分株的形成主要是由于有害生物对地面的高水平干扰。在当前情况下，如果没有积极和及时的现场管理，人口可能会灭绝。

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