Fructan and antioxidant metabolisms in plants of Lolium perenne under drought are modulated by exogenous nitric oxide

Autor: Victória Carvalho, André Luiz Wendt dos Santos, Annette Morvan-Bertrand, Maria Angela Machado de Carvalho, Marília Gaspar, Athos Poli Rigui, Marie-Pascale Prud'homme
Přispěvatelé: Ecophysiologie Végétale, Agronomie et Nutritions (EVA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Recherche Agronomique (INRA), Instituto de Botanica, Sao Paulo, Instituto de Botânica, Universidade de São Paulo (USP), Ecophysiologie Végétale, Agronomie et Nutritions NCS (EVA), Normandie Université (NU)-Normandie Université (NU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Rok vydání: 2019
Předmět:
Perennial ryegrass
0106 biological sciences
0301 basic medicine
Antioxidant
Stress signaling
Physiology
[SDV]Life Sciences [q-bio]
medicine.medical_treatment
Drought tolerance
Plant Science
Nitric Oxide
medicine.disease_cause
01 natural sciences
Lolium perenne
Antioxidants
S-Nitrosoglutathione
03 medical and health sciences
chemistry.chemical_compound
Fructan
Lolium
Genetics
medicine
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
S-nitrosoglutathione
Food science
Water deficit
ComputingMilieux_MISCELLANEOUS
Fructan enzyme activity
2. Zero hunger
biology
fungi
Antioxidant enzyme activity
food and beverages
Plant physiology
Glutathione
15. Life on land
biology.organism_classification
6. Clean water
Droughts
Fructans
Plant Leaves
030104 developmental biology
chemistry
13. Climate action
Oxidative stress
010606 plant biology & botany
Zdroj: Plant Physiology and Biochemistry
Plant Physiology and Biochemistry, Elsevier, 2019, 145, pp.205-215. ⟨10.1016/j.plaphy.2019.10.029⟩
ISSN: 0981-9428
DOI: 10.1016/j.plaphy.2019.10.029
Popis: International audience; Drought is a major environmental factor that can trigger oxidative stress and affect plant growth and productivity. Previous studies have shown that exogenous nitric oxide (NO) can minimize oxidative stress-related damage through the modulation of antioxidant enzyme activity. Fructan accumulation also has an important role in drought tolerance, since these carbohydrates participate in osmoregulation, membrane protection and oxidant scavenging. Currently, there are few studies investigating NO-regulated fructan metabolism in response to abiotic stresses. In the present study, we sought to determine if treating plants of Lolium perenne with S-nitrosoglutathione (GSNO), a NO donor, improved drought tolerance. Two-month-old plants received water (control), GSNO and reduced glutathione (GSH) as foliar spray treatments and were then maintained under drought or well-watered conditions for 23 days. At the end of drought period, we evaluated growth, pigment content and antioxidant and fructan metabolisms. None of these conditions influenced dry mass accumulation, but the leaves of plants treated with GSNO exhibited a slight increase in pigment content under drought. GSNO treatment also induced 1-SST activity, which was associated with a 3-fold increase in fructan content. GSNO-treated plants presented higher GR activity and, consequently, increased GSH levels. L. perenne cv. AberAvon was relatively tolerant to the water stress condition employed herein, maintaining ROS homeostasis and mitigating oxidative stress, possibly due to fructan, ascorbate and glutathione pools.
Databáze: OpenAIRE
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