Meléndez E J, Ackerman J D
Department of Biology, University of Puerto Rico, 00931, Rio Piedras, PR, USA.
Oecologia. 1993 Jun;94(3):361-367. doi: 10.1007/BF00317110.
The effects of a rust infection (Sphenosphora saphena, Basidiomycetes) on several fitness components of the orchid Tolumnia (Oncidium) variegata were quantified in a subtropical moist forest of Puerto Rico. Infected and uninfected plants of two size categories were observed and manipulated by increasing natural levels of fruit production to determine the effects of infection on short and long-term sexual reproduction, subsequent vegetative and reproductive growth, and mortality. Under artificially high levels of fruit production, infection had no effect on short or long-term reproduction through male or female function except for a modest decline in seed viability in small plants. Under natural levels of fruit production, infection was only related to a reduction in the number of leaves per shoot. At artificially high levels of fruit production, infection reduced leaf length, leaf width, and the number of live shoots. Survival was not associated with rust occurrence. The rust appears to have minor ecological impact on this orchid population.
在波多黎各的亚热带湿润森林中，对锈菌感染（Sphenosphora saphena，担子菌纲）对兰花异色托卢米尼亚兰（Oncidium variegata）几个适合度成分的影响进行了量化。观察并操控了两种大小类别的受感染和未受感染植株，通过提高果实产量的自然水平来确定感染对短期和长期有性繁殖、随后的营养生长和生殖生长以及死亡率的影响。在人工提高的果实产量水平下，除了小植株的种子活力略有下降外，感染对通过雄性或雌性功能进行的短期或长期繁殖没有影响。在果实产量的自然水平下，感染仅与每枝上叶片数量的减少有关。在人工提高的果实产量水平下，感染降低了叶片长度、叶片宽度和活枝数量。存活与锈菌的发生无关。这种锈菌似乎对该兰花种群具有较小的生态影响。
