Publications by authors named "Gustavo Esteban Gergoff Grozeff"
Article Synopsis
- Canopy shade activates PHYTOCHROME INTERACTING FACTORS (PIFs), which boosts auxin synthesis in cotyledons, promoting hypocotyl growth for better light access.
- The study explores how shade influences cellular redox status and finds that high auxin levels under shade increase reactive oxygen species and nitric oxide in the hypocotyl.
- COP1, a positive growth regulator, is affected by redox regulation; when this mechanism is disrupted, it leads to poor hypocotyl growth coordination and reduced competitive ability against neighboring plants.
The oxidant/antioxidant balance affects the ripening time of tomato fruit. Ripening of tomato fruit is associated with several modifications such as loss of cell wall firmness and transformation of chloroplasts to chromoplasts. Besides a peak in HO, reactive oxygen species (ROS) are observed at the transition stage.
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- The study examines how plant hormones brassinosteroids (BRs) and ethylene (ET) affect ascorbic acid-glutathione levels in tomato plants, revealing their interaction in regulating antioxidant metabolism.
- BR-deficient mutant leaves have low total ascorbic acid (AA), while BR-accumulating leaves maintain normal AA levels, indicating that both BR and ET pathways influence AA synthesis.
- Suppressing ET in BR-deficient and BR-accumulating plants restores normal AA content and enzyme activity, suggesting that while ET inhibits AA synthesis, BRs promote it.