Petropoulou Y, Georgiou O, Psaras G K, Manetas Y
Section of Plant Biology, Department of Biology, University of Patras, GR-265 00 Patras, Greece.
New Phytol. 2001 Oct;152(1):85-90. doi: 10.1046/j.0028-646x.2001.00241.x.
• The effects of enhanced UV-B radiation on reproductive and pollination success were investigated in the Mediterranean annual Malcolmia maritima. • Plants were exposed in the field to ambient or ambient plus supplemental UV-B radiation (biologically equivalent to a 15% ozone depletion over Patras, Greece, 38°14' N, 21°44' E) up to leaf senescence and fruit maturation. • UV-B radiation had no effect on stem and fruit biomass, anthesis time and duration and flower number. However, flower diameter, nectary volume and nectar amount per flower (but not nectar concentration) were significantly increased by supplemental UV-B radiation. In addition UV-B treated plants showed higher reproductive success (i.e. lower abortion rates and higher fruit to flower ratio) and a trend to higher pollination success (i.e. increased number of seeds per fruit). As a result, the seed yield was increased. Seed mass, seed germination and early seedling growth were not affected by UV-B treatment of mother plants. • It is suggested that the UV-B induced changes in flower attributes might have affected pollinators' behaviour in a way that improved the fitness of M. maritima.
• 研究了增强的UV-B辐射对地中海一年生植物滨海麦蓝菜繁殖和授粉成功率的影响。
• 在田间将植物暴露于环境水平或环境水平加补充UV-B辐射（生物学上相当于希腊帕特雷（北纬38°14′，东经21°44′）上空15%的臭氧消耗）下，直至叶片衰老和果实成熟。
• UV-B辐射对茎和果实生物量、开花时间和持续时间以及花的数量没有影响。然而，补充UV-B辐射显著增加了花直径、蜜腺体积和每朵花的花蜜量（但不包括花蜜浓度）。此外，经UV-B处理的植物表现出更高的繁殖成功率（即更低的败育率和更高的果花比）以及授粉成功率提高的趋势（即每个果实的种子数量增加）。结果，种子产量增加。母本植物经UV-B处理对种子质量、种子萌发和幼苗早期生长没有影响。
• 有人提出，UV-B诱导的花性状变化可能以某种方式影响了传粉者的行为，从而提高了滨海麦蓝菜的适合度。
