Abstract
Grapes are an important economic crop and are widely cultivated around the world. Most grapes are grown in arid or semi-arid regions, and droughts take a heavy toll in grape and wine production areas. Developing effective drought-resistant cultivation measures is a priority for viticulture. Melatonin, an indoleamine, mediates many physiological processes in plants. Herein, we examined whether exogenously applied melatonin could improve the resistance of wine grape seedlings grown from cuttings to polyethylene glycol-induced water-deficient stress. The application of 10% polyethylene glycol (PEG) markedly inhibited the growth of cuttings, caused oxidative stress and damage from H2 O2 and O2∙-, and reduced the potential efficiency of Photosystem II and the amount of chlorophyll. Application of melatonin partially alleviated the oxidative injury to cuttings, slowed the decline in the potential efficiency of Photosystem II, and limited the effects on leaf thickness, spongy tissue, and stoma size after application of PEG. Melatonin treatment also helped preserve the internal lamellar system of chloroplasts and alleviated the ultrastructural damage induced by drought stress. This ameliorating effect may be ascribed to the enhanced activity of antioxidant enzymes, increased levels of nonenzymatic antioxidants, and increased amount of osmoprotectants (free proline). We conclude that the application of melatonin to wine grapes is effective in reducing drought stress.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
PEG inhibited cutting growth.
Not reportedComparator
Verbatim
e0“The application of 10% polyethylene glycol (PEG) markedly inhibited the growth of cuttings”
t0“grape cuttings”
Claim · model-written summary
PEG caused oxidative stress and damage.
Not reportedComparatorDirection
Verbatim
e0“caused oxidative stress and damage from H2 O2 and O2∙-”
e1“The application of 10% polyethylene glycol (PEG) markedly inhibited the growth of cuttings”
t0“grape cuttings under water‐deficient stress”
Claim · model-written summary
PEG reduced photosystem II potential efficiency and chlorophyll.
- Taxon
- grapet0
- Treatment
- PEGe1
- Outcome
- potential efficiency of Photosystem II and the amount of chlorophylle0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“reduced the potential efficiency of Photosystem II and the amount of chlorophyll”
e1“The application of 10% polyethylene glycol (PEG) markedly inhibited the growth of cuttings”
t0“grape cuttings under water‐deficient stress”
Claim · model-written summary
Melatonin partially alleviated oxidative injury under PEG.
Not reportedComparator
Verbatim
e0“Application of melatonin partially alleviated the oxidative injury to cuttings”
t0“grape cuttings”
Claim · model-written summary
Melatonin slowed the decline in photosystem II efficiency.
- Taxon
- grapet0
- Treatment
- melatonint0
- Outcome
- potential efficiency of Photosystem IIe0
- Direction
- slowed the declinee0
Not reportedComparator
Verbatim
e0“slowed the decline in the potential efficiency of Photosystem II”
t0“melatonin on grape cuttings”
Claim · model-written summary
Melatonin limited PEG effects on leaf thickness, spongy tissue, and stomatal size.
- Taxon
- grapet0
- Treatment
- melatonint0
- Outcome
- leaf thickness, spongy tissue, and stoma sizee0
- Direction
- limitede0
Not reportedComparator
Verbatim
e0“limited the effects on leaf thickness, spongy tissue, and stoma size after application of PEG”
t0“melatonin on grape cuttings”
Claim · model-written summary
Melatonin preserved the chloroplast lamellar system and alleviated ultrastructural damage.
- Taxon
- grapet0
- Treatment
- Melatonin treatmente0
- Outcome
- internal lamellar system of chloroplasts and alleviated the ultrastructural damagee0
- Direction
- preservee0
Not reportedComparator
Verbatim
e0“Melatonin treatment also helped preserve the internal lamellar system of chloroplasts and alleviated the ultrastructural damage induced by drought stress”
t0“grape cuttings”
Claim · model-written summary
The authors attributed melatonin protection to antioxidant enzymes, nonenzymatic antioxidants, and proline.
Verbatim
e0“This ameliorating effect may be ascribed to the enhanced activity of antioxidant enzymes, increased levels of nonenzymatic antioxidants, and increased amount of osmoprotectants (free proline)”
t0“grape cuttings”
The same questions in other papers
melatonin · pest · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
melatonin · growth · VitisResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.