Neuffer Barbara, Schorsch Michael, Hameister Steffen, Knuesting Johannes, Selinski Jennifer, Scheibe Renate
Department of Botany, University of Osnabrück, Osnabrück, Germany.
School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom.
PeerJ. 2020 Jun 15;8:e9226. doi: 10.7717/peerj.9226. eCollection 2020.
In the vineyards of Rhineland-Palatinate (Germany), two different types of Shepherd's Purse () coexist: (1) the common type called 'wild type', and (2) the decandric type called or ' with four stamens in place of the four petals. In this study, we compare the anatomical and physiological characters of rosette leaves of the respective types. Progeny of individual plants was cultivated in growth chambers under low- and high-light conditions. Under low-light conditions, the stomata densities of the adaxial and abaxial epidermis did not differ between the two types. When grown under high-light conditions, wild type and , both exhibited increased stomata densities compared to low-light conditions, but to a lesser extent than the wild type. The maximal photosynthetic capacity of was lower in both, low-light and high-light conditions compared to wild-type plants. Under all CO concentrations, seemed to be less productive. The less effective CO assimilation of the mutant was accompanied by later flowering This fact prolonged the vegetative phase of by about two weeks and was sufficient for the maintenance of both populations stably over years.
在德国莱茵兰-普法尔茨州的葡萄园里，两种不同类型的荠菜共存：（1）常见类型称为“野生型”，（2）十蕊型称为“四雄蕊荠菜”，即有四个雄蕊取代了四个花瓣。在本研究中，我们比较了各类型莲座叶的解剖学和生理学特征。将单株植物的后代在生长室中于低光照和高光照条件下培养。在低光照条件下，两种类型的叶片上表皮和下表皮的气孔密度没有差异。在高光照条件下生长时，野生型和“四雄蕊荠菜”与低光照条件相比，气孔密度均增加，但“四雄蕊荠菜”的增加程度小于野生型。在低光照和高光照条件下，“四雄蕊荠菜”的最大光合能力均低于野生型植株。在所有二氧化碳浓度下，“四雄蕊荠菜”的生产力似乎都较低。“四雄蕊荠菜”突变体较低的二氧化碳同化效率伴随着开花延迟。这一事实使“四雄蕊荠菜”的营养生长期延长了约两周，足以使两个种群多年来稳定维持。
