Batty A L, Dixon K W, Brundrett M, Sivasithamparam K
Botanic Gardens and Parks Authority, Kings Park and Botanic Garden, West Perth, Western Australia 6005, Australia.
Soil Science & Plant Nutrition, University of Western Australia, Nedlands, Western Australia 6907, Australia.
New Phytol. 2001 Dec;152(3):511-520. doi: 10.1046/j.0028-646X.2001.00277.x.
• The dependence of seeds of terrestrial orchids on specific fungi for germination provides a means of locating these fungi in the wild and to investigate the role of appropriate fungi in the germination of orchid seed and development of seedlings under natural field conditions. • Seed baits, comprising orchid (Caladenia arenicola) seed enclosed in fine nylon mesh, were placed at sample points along four transects through two orchid populations in bushland in Western Australia. Seed germination was scored and compared with adult orchid plant distribution and soil factors. • A small fraction of available seed (< 1%) germinated to a stage of tuber formation where survival over the subsequent dry season would have been possible. Germination increased in the vicinity of adult C. arenicola plants, but other factors, such as soil potassium levels and presence of leaf litter, were also correlated with seed germination. • The measurement of the spatial variability in germination events within an orchid habitat demonstrated the availability of new recruitment sites. This information is required to assess the natural recruitment capacity and the potential for orchid reintroduction in natural habitats.
• 陆生兰花种子依赖特定真菌进行萌发，这为在野外定位这些真菌提供了一种方法，并有助于研究合适的真菌在自然田间条件下兰花种子萌发和幼苗发育中的作用。
• 将包含装在细尼龙网中的兰花（卡氏兰花）种子的种子诱饵，放置在穿过西澳大利亚丛林中两个兰花种群的四条样带上的采样点。对种子萌发情况进行评分，并与成年兰花植株分布和土壤因素进行比较。
• 一小部分可用种子（<1%）萌发到形成块茎的阶段，在随后的旱季有可能存活下来。在成年卡氏兰花植株附近萌发率增加，但其他因素，如土壤钾含量和落叶层的存在，也与种子萌发相关。
• 对兰花栖息地内萌发事件的空间变异性进行测量，证明了新的补充地点的可用性。评估自然栖息地的自然补充能力和兰花重新引入的潜力需要这些信息。
