应用一种简单的叶片伸展仪研究干旱对高粱的影响

• 作 者: R.E.Sharp O.Osonubi W.A.Wood W.J.Davies 戴俊英
• 出 处: 国外农学-杂粮作物
• 发表日期: 1982年04期
• 关键词: 高粱 玉米栽培 膨压 叶片 黑暗时期 叶子 光照 叶细胞 溶质势 溶质

禾谷类作物叶子的生长主要是伸展,因而曾用不同类型的生长计进行研究。Acevedo等(1971)描述过一种最常用的测量叶子的仪器[线性可调差异变压器(LYDT)],但Gallagher等(1976)曾详细指出有关此技术的某些固有缺点。应用LVDF能显示一些玉米栽培品种在整个光照和黑暗时期,叶片几乎以不变的速度持续进行伸展(Hsiao等,1976)。在光照时期尽管水势实质上是下降的,但由于叶细胞中溶质的积聚,故始终保持着膨压。这些事实启示人们,若干不同植物的渗透调

The growth of the leaves of cereal crops is mostly stretches, and therefore different types of growth gages have been studied. Acevedo et al. (1971) described one of the most commonly used leaf-measuring instruments [LYDT], but Gallagher et al. (1976) pointed out some of the inherent disadvantages of this technique. Application of LVDF to Show Some Corn Cultivars The leaves continued to stretch almost at constant rates throughout the light and dark period (Hsiao et al., 1976). Although the water potential is declining substantially during the light period, turgor pressure is always maintained due to the accumulation of solutes in the leaf cells. These facts inspired people, the infiltration of a number of different plants