GROWTH FORMS, CARBON ALLOCATION, AND REPRODUCTIVE PATTERNS OF HIGH ARCTIC SAXIFRAGES
GROWTH FORMS, CARBON ALLOCATION, AND REPRODUCTIVE PATTERNS OF HIGH ARCTIC SAXIFRAGES
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DOI：
10.2307/1551014
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发表时间：
1985-01-01
期刊：
影响因子：
--
通讯作者：
BLISS, LC
中科院分区：
文献类型：
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作者：
GRULKE, NE;BLISS, LC
描述了代表高北极地区三种重要非草本生长形式（矮直立、垫状和莲座状）的七种虎耳草的繁殖策略的组成部分。确定了每个物种的繁殖努力、开花频率、传播模式以及根、叶和花序的碳分配（干重、热量）。尽管繁殖策略不能推广到每种生长形式，但碳分配和繁殖的三个趋势是明显的。与开花组织相比，虎耳草（矮化直立花草）、S. foliolosa（莲座丛）和 S. flagellaris（莲座丛）对营养组织的碳分配较高，并通过营养方式（珠芽、基生芽、有匍匐茎的珠芽）繁殖。与营养组织相比，河虎耳草（矮直立花草）和雪虎耳草（莲座丛）在开花组织中的碳分配较高，通过种子繁殖，并且未成熟植物与成熟植物的比例较高。与营养组织相比，虎耳草（垫状）和 S. tenuis（莲座状）在开花组织中的碳分配较高，通过种子繁殖，并且成熟植物与未成熟植物的比例较高。这三种繁殖模式大致遵循其他工蚁在 1979 年概述的模式。
Components of reproductive strategy are described for seven species of Saxifraga representing three important forb growth forms (dwarf erect, cushion, and rosette) in the High Arctic. Reproductive effort, flowering frequency, dispersal patterns, and carbon allocation (dry weight, caloric) to roots, leaves, and inflorescences were determined for each species. Although reproductive strategies could not be generalized for each growth form, three trends in carbon allocation and reproduction were apparent. Saxifraga cernua (dwarf erect forb), S. foliolosa (rosette), and S. flagellaris (rosette) had high carbon allocation to vegetative versus flowering tissue, and reproduced by vegetative means (bulbils, basal budding, stoloniferous bulbils). Saxifraga rivularis (dwarf erect forb) and S. nivalis (rosette) had a high carbon allocation to flowering versus vegetative tissue, reproduced by seed, and had a high ratio of immature to mature plants. Saxifraga caespitosa (cushion) and S. tenuis (rosette) had a high carbon allocation to flowering versus vegetative tissue, reproduced by seeds, and had a high ratio of mature to immature plants. These three reproductive patterns roughly follow those outlined in 1979 by other workers.