SPEED OF DEVELOPMENT OF RADIATE AND NON‐RADIATE PLANTS OF SENECIO VULGARISL. FROM HABITATS SUBJECT TO DIFFERENT DEGREES OF WEEDING PRESSURE
SPEED OF DEVELOPMENT OF RADIATE AND NON‐RADIATE PLANTS OF SENECIO VULGARISL. FROM HABITATS SUBJECT TO DIFFERENT DEGREES OF WEEDING PRESSURE
复制标题
不同程度除草压力下生境中辐射植物和非辐射植物的发育速度。
DOI：
10.1111/j.1469-8137.1985.tb03645.x
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发表时间：
1985
期刊：
影响因子：
9.4
通讯作者：
D. Briggs
中科院分区：
文献类型：
--
作者：
J. Kadereit;D. Briggs
总结
在栽培实验中，来自杂草密集生境的辐射和非辐射千里光 (S. vulgaris ssp. vulgaris var. hibernicus Syme 和 var. vulgaris) 植物从播种到第一次结果的速度比来自杂草较少生境的植物生长得更快。在相同的栖息地内，非辐射植物从播种到首次结果的速度比辐射植物更快。生命周期的缩短是通过从播种到第一个头状花序芽形成的更快发育来实现的，从而导致植物较短，主轴上的叶子较少。相比之下，快速发育的植物从开花到第一次结果的发育需要更长的时间，并且第一次结果的头状花序上的瘦果数量和潜在的繁殖产量较小。这是由于快速发育的植物中叶子数量较少而导致资源可用性降低的原因。
讨论了两个辐射普通链球菌种群的可能起源。
Summary
In a cultivation experiment, plants of both radiate and non-radiate Senecio vulgaris L. (S. vulgaris ssp. vulgaris var. hibernicus Syme and var. vulgaris) from intensively weeded habitats develop more quickly from sowing to first fruiting than plants from less intensively-weeded habitats. Within the same habitat, non-radiate plants are quicker from sowing to first fruiting than radiate plants. This shortening of the life-cycle is achieved by a faster development from sowing to the formation of the first capitulum buds, resulting in shorter plants with fewer leaves on the main axis. In contrast, the development from anthesis to first fruiting takes longer in quick-developing plants, and the number of achenes on the first fruiting capitulum as well as the potential reproductive output is smaller. This is explicable in terms of reduced availability of resources resulting from the smaller number of leaves in the quick-developing plants.
The possible origin of the two populations of radiate S. vulgaris is discussed.