Abstract
This experiment aimed to test whether recovery of shoot hydraulic conductivity after drought depends on cellular metabolism in addition to xylem hydraulics. We rehydrated droughted grapevines (Vitis vinifera) after treating intact plants through the root with 0.5 mm mercuric chloride (a metabolic inhibitor) at the end of the stress period, before rehydration. The contribution of mercury-inhibited water transport in both shoot and root, and the extent of shoot vessel embolization, were assessed. Drought stress decreased plant water potential and induced embolization of the shoot vessels. The rehydration in Hg-untreated plants re-established both shoot water potential and specific shoot hydraulic conductivity (Kss) at levels comparable with watered controls, and induced recovery of most of the embolisms formed in the shoot during the drought. In contrast, in plants treated with HgCl2, recovery of Kss and root hydraulic conductance were impaired. In rehydrated, Hg-treated plants, the effects of Hg on Kss were reversed when either the shoot or the root was treated with 60 mM beta-mercaptoethanol as a mercuric scavenger. This work suggests that plant cellular metabolism, sensitive to mercuric chloride, affects the recovery of shoot hydraulic conductivity during grapevine rehydration by interfering with embolism removal, and that it involves either the root or the shoot level.
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Claims 8
Claim · model-written summary
In Hg-untreated grapevines, rehydration re-established shoot water potential at levels comparable with watered controls.
- Taxon
- Vitis vinifera
Vitis viniferae0 - Treatment
- rehydration in Hg-untreated plantse1
- Outcome
- shoot water potentiale1
- Direction
- re-establishede1
- Comparator
- watered controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e1“The rehydration in Hg-untreated plants re-established both shoot water potential and specific shoot hydraulic conductivity (Kss) at levels comparable with watered controls”
Claim · model-written summary
In Hg-untreated grapevines, rehydration re-established specific shoot hydraulic conductivity (Kss) at levels comparable with watered controls.
- Taxon
- Vitis viniferaVitis viniferae0
- Treatment
- rehydration in Hg-untreated plantse1
- Outcome
- specific shoot hydraulic conductivity (Kss)e1
- Direction
- re-establishede1
- Comparator
- watered controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e1“The rehydration in Hg-untreated plants re-established both shoot water potential and specific shoot hydraulic conductivity (Kss) at levels comparable with watered controls”
Claim · model-written summary
Rehydration of Hg-untreated grapevines induced recovery of most of the shoot embolisms formed during drought.
- Taxon
- Vitis viniferaVitis viniferae0
- Treatment
- rehydration in Hg-untreated plantse1
- Outcome
- most of the embolisms formed in the shoote1
- Direction
- induced recovery ofe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e1“The rehydration in Hg-untreated plants re-established both shoot water potential and specific shoot hydraulic conductivity (Kss) at levels comparable with watered controls, and induced recovery of most of the embolisms formed in the shoot during the drought”
Claim · model-written summary
Mercuric chloride treatment impaired recovery of specific shoot hydraulic conductivity and root hydraulic conductance in rehydrated grapevines.
- Taxon
- Vitis viniferaVitis viniferae0
- Treatment
- HgCl2e2
- Outcome
- recovery of Kss and root hydraulic conductancee2
- Direction
- impairede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e2“In contrast, in plants treated with HgCl2, recovery of Kss and root hydraulic conductance were impaired”
Claim · model-written summary
Beta-mercaptoethanol reversed the effects of mercuric chloride on specific shoot hydraulic conductivity in rehydrated grapevines.
- Taxon
- Vitis viniferaVitis viniferae0
- Treatment
- beta-mercaptoethanole3
- Outcome
- the effects of Hg on Ksse3
- Direction
- reversede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e3“In rehydrated, Hg-treated plants, the effects of Hg on Kss were reversed when either the shoot or the root was treated with 60 mM beta-mercaptoethanol as a mercuric scavenger”
Claim · model-written summary
Drought stress decreased plant water potential in grapevine.
- Taxon
- Vitis viniferaVitis viniferae0
- Treatment
- Drought stresse5
- Outcome
- plant water potentiale5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e5“Drought stress decreased plant water potential and induced embolization of the shoot vessels”
Claim · model-written summary
Drought stress induced embolization of the shoot vessels in grapevine.
- Taxon
- Vitis viniferaVitis viniferae0
- Treatment
- Drought stresse5
- Outcome
- embolization of the shoot vesselse5
- Direction
- inducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e5“Drought stress decreased plant water potential and induced embolization of the shoot vessels”
Claim · model-written summary
Cellular metabolism, sensitive to mercuric chloride, affects recovery of shoot hydraulic conductivity in grapevine by interfering with embolism removal.
- Taxon
- Vitis viniferaVitis viniferae0
- Outcome
- recovery of shoot hydraulic conductivitye4
- Qualifier
- interfering with embolism removale4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“droughted grapevines (Vitis vinifera)”
e4“This work suggests that plant cellular metabolism, sensitive to mercuric chloride, affects the recovery of shoot hydraulic conductivity during grapevine rehydration by interfering with embolism removal”
The same questions in other papers
rewatering · physiology: water · Vitis vinifera (wine grape)Positive and negative results
1 reporting no difference from an alternative
- no effect
drought · physiology: water · Vitis vinifera (wine grape)Positive and negative results
5 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 papers →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.