The gibberellin-deficient dwarf2 mutant of sunflower shows a high constitutive level of jasmonic and salicylic acids and an elevated energy dissipation capacity in well-watered and drought conditions

• Published in: Environmental and experimental botany Vol. 194; p. 104697
• Main Authors: Mariotti, Lorenzo, Fambrini, Marco, Pugliesi, Claudio, Scartazza, Andrea
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2022
• Subjects: biosynthesis; chloroplasts; climate change; drought; drought tolerance; Dwarf mutant; energy conversion; Fluorescence measurements; Gas exchange; Helianthus annuus; Hormonal content; leaf area; leaves; mutants; photochemistry; photoinhibition; Photosynthesis-related genes; ribulose-bisphosphate carboxylase; soil; stomatal conductance; water deprivation; water shortages; Water stress; Dwarf mutant; Gas exchange; Photosynthesis-related genes; Fluorescence measurements; Water stress; Hormonal content

Understanding the role of a low gibberellin (GA) level in counteracting water stress is crucial to improve crop productivity under future climate change scenarios. To date, there have been only a few studies on the physiological characterisation of severe dwarf mutants with deficient GA biosynthesis...