Stomatal Behavior and Water Status of Maize, Sorghum, and Tobacco under Field Conditions: II. At Low Soil Water Potential.
Stomatal Behavior and Water Status of Maize, Sorghum, and Tobacco under Field Conditions: II. At Low Soil Water Potential.
复制标题
田间条件下玉米、高粱和烟草的气孔行为和水分状况：II。
DOI：
10.1104/pp.53.3.360
复制
发表时间：
1974
期刊：
影响因子：
7.4
通讯作者：
Neil C. Turner
中科院分区：
文献类型：
--
作者：
Neil C. Turner
同时跟踪了玉米（Zea mays L.）近轴叶表面辐照度（I）、叶阻力（r（1））、叶水势（psi）、渗透势（pi）和膨压势（P）的垂直分布的日变化。CV. Pa 602 A）、高粱（Sorghum bicolor [L.] Moench cv. RS 610）和烟草（Nicotiana tabacum L.）CV. Havanna Seed 211）在1968 ~ 1970年土壤水势较低的几天内进行了试验。在日出后[大约东部标准时间0530时]，随着I的增加，用通风扩散孔隙计测量的上部树冠中叶片的r（1）暂时降低，但随后r（1）在东部标准时间0700和0830时之间再次增加，因为用压力室测量的psi从-7的值迅速降低，在玉米、高粱和烟草中，在日出时分别为-4和-6巴，在接近中午时分别为-18、-22和-15巴的最小值。用蒸汽压渗透压计测得的pi在日出后也下降，但下降程度与psi的下降程度不同，因此在0730和0800小时之间，某些叶片中的P达到零。较低的（更负）PI的叶片在上面的树冠比那些在下面的树冠给了上面的叶子一个更高的P在一个给定的psi比在所有三个物种的下部叶子;在中间高度的叶子有一个中间P.这种差异在树冠的三个高度的叶子之间保持在所有值的psi。r（1）在很宽的磷浓度范围内保持不变，然后在玉米、高粱和烟草中分别在磷浓度为2巴、-1巴和接近零时显著增加：在玉米、高粱和烟草中间高度的叶片中，r（1）也保持不变，直到psi分别下降到-17、-20和-13巴。在所有三个物种中，上部冠层中的叶片的r（1）比下部冠层中的叶片增加更多的负psi值，并且在烟草中，上部冠层中的叶片比下部冠层中的叶片萎蔫更多的负psi值。
Diurnal changes in the vertical profiles of irradiance incident upon the adaxial leaf surface (I), leaf resistance (r(1)), leaf water potential (psi), osmotic potential (pi), and turgor potential (P) were followed concurrently in crops of maize (Zea mays L. cv. Pa602A), sorghum (Sorghum bicolor [L.] Moench cv. RS 610), and tobacco (Nicotiana tabacum L. cv. Havanna Seed 211) on several days in 1968 to 1970 when soil water potentials were low. The r(1), measured with a ventilated diffusion porometer, of the leaves in the upper canopy decreased temporarily after sunrise [ approximately 0530 hours Eastern Standard Time] as I increased, but then r(1) increased again between 0700 and 0830 hr Eastern Standard Time as the psi, measured with a pressure chamber, decreased rapidly from the values of -7, -4 and -6 bars at sunrise to minimal values of -18, -22 and -15 bars near midday in the maize, sorghum, and tobacco, respectively. The pi, measured with a vapor pressure osmometer, also decreased after sunrise, but not to the same degree as the decrease in psi, so that a P of zero was reached in some leaves between 0730 and 0800 hours. The lower (more negative) pi of leaves in the upper canopy than those in the lower canopy gave the upper leaves a higher P at a given psi than the lower leaves in all three species; leaves at intermediate heights had an intermediate P. This difference between leaves at the three heights in the canopy was maintained at all values of psi. The r(1) remained unchanged over a wide range of P and then increased markedly at a P of 2 bars in maize, -1 bar in sorghum, and near zero P in tobacco: r(1) also remained constant until psi decreased to -17, -20, and -13 bars in leaves at intermediate heights in maize, sorghum, and tobacco, respectively. In all three species r(1) of leaves in the upper canopy increased at more negative values of psi than those at the base of the canopy, and in tobacco, leaves in the upper canopy wilted at more negative values of psi than those in the lower canopy.
植物水分状态和水分输送的调节
DOI：
--
发表时间：
2001
期刊：
Japanese Journal of Crop Science 70(4)
影响因子：
--
作者：
Hirasawa;T.
通讯作者：
T.