Growth, photosynthesis and production of safflower (Carthamus tinctorius L.) in response to different levels of salinity and drought
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Department of Water Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Department of Soil and Water Research, Kerman Agricultural and Natural Resources Research and Education Centre, AREEO, Kerman, Iran
Department of Crop and Horticultural Sciences Research, Isfahan Agricultural and Natural Resources Research and Education Centre, AREEO, Isfahan, Iran
Hossein Babazadeh   

Department of Water Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Tehran, Iran
Final revision date: 2022-03-24
Acceptance date: 2022-03-31
Publication date: 2022-04-27
Int. Agrophys. 2022, 36(2): 93–104
  • • the effects of simultaneously stresses on important step of plant growth
  • • the evaluation of the photosynthetic, growth, and yield of safflower
  • • drought and salinity stress negatively affect on photosynthesis, plant growth, and yield
In order to investigate the effects of salinity and drought stress on the photosynthesis, growth and production responses of safflower, two experiments were performed in Isfahan, Iran using four different levels of saline water, four different levels of irrigation water, and their combinations which were applied at three different growth stages (stem elongation, heading, and flowering) in 2016 and 2017. A split-plot experiment based on complete block design was performed with three replicates. The plant height, leaf area index, relative water content, number of heads per plant, number of seeds per head, 1000-seeds weight, seed yield, oil content, net photosynthetic rate, stomatal conductance and transpiration rate decrease under salinity, drought, and simultaneous stresses. The reduction in seed yield caused by the 10 dS m-1 and 40% of irrigation treatment was higher at the heading stage (92.6%) when compared with the stem elongation (71.04%) and flowering (89.9%) stages. In general, the reduction in seed yield caused by salinity-drought stress was higher at the heading stage as compared with stem elongation and the flowering stages.
No potential conflict of interest was reported by the authors.
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