Heat and Drought Influence Photosynthesis, Water Relations, and Soluble Carbohydrates of Two Ecotypes of Redbud (Cercis canadensis)
By J. Griffin, T. Ranney, D. Pharr. Journal of the American Society for Horticultural Science, 2004
116 citations recorded by the source corpus.
Net photosynthesis (Pn) of two ecotypes of redbud (Cercis canadensis L.) was studied following growth under high temperatures and increasing drought. Although mexican redbud [C. canadensis var. mexicana (Rose) M. Hopkins] exhibited greater Pn than eastern redbud (C. canadensis var. canadensis L.), Pn decreased at a similar rate under water deficit stress for both ecotypes. Mexican redbud also had greater instantaneous water use efficiency [net photosynthesis: transpiration (WUE)] than eastern redbud. Differences in both Pn and WUE might have been due to differences in leaf thickness. The optimum temperature for potential photosynthetic capacity (37 °C) was unaffected by irrigation or ecotype. Tissue osmotic potential at full turgor was more negative in eastern redbud, but was unaffected by drought stress in either ecotype. Soluble carbohydrate content was higher in eastern redbud, and in both ecotypes, d-pinitol was the major soluble carbohydrate and was considerably more abundant in the water-stressed plants. Total polyol content (myo-inositol + ononitol + pinitol) was also greater in the water-stressed plants. Both ecotypes were very tolerant of high temperatures and drought.
Subfields: Food Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/854c9a4e655a8c311233bedb96a6e7bb296a11f6
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Citations in the corpus
- Impact of Climate Change on Crops Adaptation and Strategies to Tackle Its Outcome: A Review (2019, background): “Drought and high temperatures are key stress factors with high impact on cereal yields [33], and Rubisco, the central enzyme of photosynthesis, is disrupted if the temperature increases from 35 ◦C, and stops the photosynthetic process [34].”