Effect of gradually water stress and recovery on photosynthesis,transpiration,and stomatal conductance in two plantago species
Photosynthesis,transpiration,stomatal conductance and leaf water potential characteristics were examined in two plantago species ( Plantago ov ata and P.psyllium),with developing gradually water stress for several days after watering and then permitted to recover by re‐watering.The photosynthetic rate,transpiration rate,and stomatal conductance decreased rapidly by withholding water for 2 days.After re‐watering the rate of recovery of photosynthesis, transpiration,and stomatal conductance decreased gradually as the days without watering became longer.The differences existed in rates of recovery of photosynthesis,transpiration,and stomatal conductance following drought stress.Among the fractional recoveries the highest was photosynthesis,and the lowest was stomatal conductance.Photosynthesis rate following drought stress was rapidly recovered until 2 days after re‐watering,and then recovered slowly.The critical time for the recovery of photosynthesis was recognized.The results show clearly a close correlation between the leaf water potential and the recovery level and speed of photosynthesis,transpiration,and stomatal conductance.
Photosynthesis Stomatal conductance Transpiration Drought stress Recovery
A,Rahimi H.R.Rahimian Mashhadi M.R.Jahansoz
Department of Agronomy and Plant Breeding,Agriculture College,Raf sanj an University,Rasanj an,Iran Department of Agronomy and Plant Breeding,Agronomy and Animal Science College,Agriculture and Natura Department of Agronomy and Plant Breeding,Agronomy and Animal Science College,Agriculture and Natura
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）