The ballistics of Sordaria
The ballistics of Sordaria
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DOI：
10.1111/j.1469-8137.1959.tb05333.x
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发表时间：
1959-01-01
期刊：
影响因子：
9.4
通讯作者：
HADLAND, SUSAN A.
中科院分区：
文献类型：
--
作者：
INGOLD, C. T.;HADLAND, SUSAN A.
重新描述了 S. fimicola 的子囊壳结构。研究了孢子排出的水平距离。孢子可被发射到最远 10.5 厘米的距离。通过排出子囊壳而从水平方向沉积的孢子沉积物包含所有可能尺寸的孢子组（弹丸）（即具有 1、2、3、4、5、6、7 或 8 个孢子）。一组中的孢子越多，排出的平均距离就越大。沉积物中存在不同尺寸的射弹表明孢子倾向于粘在一起，但在排放过程中，在 8 个逃逸孢子的行中的 7 个间隔中的任何一个间隔都可能发生分离。假设在任何这些间隔发生中断的可能性相同，结果表明不同尺寸的射弹数量与预期非常一致。孢子在低温下粘在一起的倾向比在高温下更大。 21-24℃时8孢子射弹的水平发射平均距离比7-10℃时高约20%。通过将子囊射流捕获在快速旋转（约每秒 24 转）的透明“有机玻璃”水平盘上，对垂直喷射的子囊射流进行了分析。结果证实了这样的观点，即 8 个逃逸孢子的行中的断裂可能发生在 7 个可能的断裂点中的任何一个处。子囊射流的初始速度由两种独立的方法计算，两种方法都给出相同数量级的值。 ||摘要作者： 作者
The structure of the perithecium of S. fimicola is redescribed. The horizontal distance of spore discharge is studied. Spores may be shot to a distance of up to 10.5 cm. The spore deposit from horizontal by discharging perithecia contains spore groups (projectiles) of all possible sizes (i.e. with 1,2,3,4,5,6,7 or 8 spores). The more spores in a group the greater the mean distance of discharge. The existence of the different sizes of projectile in the deposit suggests that the spores tend to stick together, but separation may occur during discharge at any of the 7 intervals in the row of 8 escaping spores. On the assumption that a break is equally likely at any of these intervals, it is shown that the numbers of projectiles of the different sizes agree closely with expectation. The tendency of spores to stick together is greater at low than at high temperature. The mean distance of horizontal discharge of 8-spore projectiles is about 20% higher at 21-24[degree]C than at 7-10[degree]C. Ascus jets discharging vertically have been analysed by catching them on a rapidly rotating (c 24 rev. per sec.) horizontal disk of transparent "perspex". The results confirm the view that a break in the row of 8 escaping spores can occur at any of the 7 possible points of breakage. The initial velocity of the ascus jet is computed by 2 independent methods, both giving values of the same general order of magnitude. || ABSTRACT AUTHORS: Authors