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Osmotic stress at membrane level and photosystem II activity in two C4 plants after growth in elevated CO 2 and temperature
Author(s) -
Bordig Leandra,
Faria Ana P.,
França Marcel G. C.,
Fernandes Geraldo W.
Publication year - 2019
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/aab.12483
Subject(s) - biology , photosynthesis , osmotic shock , osmotic pressure , ecophysiology , photosystem ii , heat stress , heat shock , shock (circulatory) , botany , plant physiology , agronomy , horticulture , heat shock protein , zoology , biochemistry , medicine , gene
In the last two decades, several studies have evaluated plant physiology, growth and survival under forecasted climate changes and the effects of these environmental factors in plants are started to be understood. However, there are few studies evaluating such effects at the tissue or cellular level, especially for plants with photosynthetic C4 metabolism that are believed to respond less to elevated CO 2 concentration. For this reason, we tested maize and pearl millet plants to consider cellular physiological responses to induce osmotic stress and acute heat shock. Plants were grown under elevated CO 2 concentration and temperature, simulating global climate changes and then were subjected to osmotic stress and acute heat shock in vitro. The results indicated that the growth under elevated CO 2 and temperature improved cellular tolerance to osmotic stress and acute heat shock for both species, but maize seemed to benefit more from increased CO 2 concentration whereas pearl millet seemed to benefit more from increased temperature. Taken together, the results indicated that the current and expected global climate changes, besides operating differentially in these two species, can similarly affect other C4 plant species in different ecosystems whether undisturbed or managed.