Biomass, chlorophyll fluorescence, and osmoregulation traits let differentiation of wild and cultivated Amaranthus under water stress
Autor: | Ana P. Barba de la Rosa, Eduardo Espitia-Rangel, Esaú Bojórquez-Velázquez, Jorge L. González-Escobar, Erandi Vargas-Ortiz, Ana K. Gutiérrez-García, Hugo M. Ramírez-Tobías |
---|---|
Rok vydání: | 2021 |
Předmět: |
Chlorophyll
Stomatal conductance 030303 biophysics Biophysics Down-Regulation 02 engineering and technology Biology Genes Plant Photosynthesis Fluorescence 03 medical and health sciences chemistry.chemical_compound Osmoregulation Stress Physiological Botany Radiology Nuclear Medicine and imaging Biomass Chlorophyll fluorescence Transpiration 0303 health sciences Amaranthus Radiation Radiological and Ultrasound Technology food and beverages 021001 nanoscience & nanotechnology Droughts chemistry Acyl Coenzyme A 0210 nano-technology Phosphoenolpyruvate carboxylase Weed Phosphoenolpyruvate Carboxykinase (ATP) |
Zdroj: | Journal of Photochemistry and Photobiology B: Biology. 220:112210 |
ISSN: | 1011-1344 |
Popis: | Amaranths are recognized by their high nutritive value and their natural tolerance to environmental stresses. In this study, physiological differences in response to water stress were compared between A. hybridus, a wild species considered as weed, and A. hypochondriacus, the most cultivated species for grain production, under the hypothesis that wild species have better adaptation to stress. In both species, photosynthetic parameters, pigments, and gene expression of selected genes were assessed. Biomass, effective quantum efficiency (ΦPSII), photochemical quenching (qP), and electron transport rate (ETR) values were reduced only in A. hybridus due to water deficit. Drought stress promoted proline accumulation by twice in A. hybridus but until three times in A. hypochondriacus. In both species, drought stress reduced net assimilation rate (A), transpiration rate (E), stomatal conductance (gs), and the expression of phosphoenol pyruvate carboxylase (PEPC). While, maximum quantum efficiency (Fv/Fm), chlorophyll, betacyanins, and the expression of ribulose1-5, bisphosphate carboxylase/oxygenase large subunit (LSU) did not change when plants were subjected to water stress. Likewise, both species accumulated total phenolic compounds and Oxalyl-CoA gene was up-regulated in response to drought. Our results have shown that A. hypochondriacus, the cultivated species, exhibited better tolerance to drought than A. hybridus, the wild species, probably due to an unconsciously selected trait during the domestication process. |
Databáze: | OpenAIRE |
Externí odkaz: |