Claim · model-written summary
Drought decreased ascorbate content in pea nodules by 59% relative to well-watered plants.
Lathyrus oleraceusVerbatim
t0“Pea Nodules Subjected to Water Stress”
e0“Drought also caused a decrease”
e1“ascorbate (59%)”
e2“well-watered”
Title
Antioxidant Defenses against Activated Oxygen in Pea Nodules Subjected to Water Stress
Y. Gogorcena; I. Iturbe-Ormaetxe; P. R. Escuredo; et al. PLANT PHYSIOLOGY 1995. doi:10.1104/pp.108.2.753
Other claims from this paper (16)
- Intervention effect Water stress decreased leghemoglobin and total soluble protein in pea nodules by 30%, indicating senescence.
- Intervention effect Drought decreased catalase activity by 25% in pea nodules relative to well-watered plants.
- Intervention effect Drought decreased ascorbate peroxidase activity by 18% in pea nodules relative to well-watered plants.
- Intervention effect Drought decreased dehydroascorbate reductase activity by 15% in pea nodules relative to well-watered plants.
- Intervention effect Drought decreased glutathione reductase activity by 31% in pea nodules relative to well-watered plants.
- Intervention effect Drought decreased superoxide dismutase activity by 30% in pea nodules relative to well-watered plants.
- Intervention effect Drought decreased reduced glutathione content in pea nodules by 57% relative to well-watered plants.
- Intervention effect Drought decreased oxidized glutathione content in pea nodules by 38% relative to well-watered plants.
- Intervention effect Drought decreased NAD+ and NADH contents in pea nodules by 43% relative to well-watered plants.
- Intervention effect Drought decreased NADP+ content in pea nodules by 31% relative to well-watered plants.
- Intervention effect Drought decreased NADPH content in pea nodules by 17% relative to well-watered plants.
- Intervention effect Water stress caused a 2-fold increase in the content of catalytic Fe in pea nodules.
- Intervention effect Water-stressed pea nodules had augmented levels of lipid peroxides, 2.4-fold.
- Intervention effect Water-stressed pea nodules had augmented levels of oxidatively modified proteins, 1.4-fold.
- Mechanism The authors suggest the decline in antioxidant capacity of pea nodules may result from a restricted NAD(P)H supply for the ascorbate-glutathione pathway and from Fe-catalyzed Fenton reactions of ascorbate and glutathione with activated oxygen.
- Mechanism The authors suggest the increase in catalytic Fe would also explain the augmented lipid peroxides in water-stressed pea nodules.