Abstract
Abstract In order to investigate the effects of root hypoxia (1–2 % oxygen) on physiology and on some fructification parameters of tomato plants ( Solanum lycopersicum cv. H63‐5), a range of physiological and agronomic measurements were performed on plants submitted to gradual root hypoxia at the second leaf stage. Stomatal conductance (g s ), total chlorophyll content, leaf area (LA) and leaf mass per area (LMA) were quantified at 14 days of treatment in the first leaf appeared before (L1) and after (L3) root hypoxia application. The results obtained showed that 7 days of treatment has slight effects on plant weight growth. However, 14 days of treatment caused decreased root dry weight (DW) with a concomitant increase in shoot DW. Root hypoxia significantly decreased g s and chlorophyll content of L3, but no effects were noted for L1. LA was significantly reduced for L1 and L3, contrary to LMA which was significantly increased. At the reproductive stage, root hypoxia resulted in a decrease in flower and fruit production, accelerated the entrance in the fruit expansion phase, but did not affect the rate of fruit growth, nor the final fruit size.
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Claims 10
Claim · model-written summary
Seven days of root hypoxia had slight effects on plant weight growth.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- root hypoxia (1–2 % oxygen)e1
- Outcome
- plant weight growthe0
- Qualifier
- 7 days of treatmente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“7 days of treatment has slight effects on plant weight growth”
e1“root hypoxia (1–2 % oxygen)”
t0“Tomato”
Claim · model-written summary
Fourteen days of hypoxia decreased root dry weight.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- root hypoxia (1–2 % oxygen)e1
- Outcome
- root dry weight (DW)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“14 days of treatment caused decreased root dry weight (DW)”
e1“root hypoxia (1–2 % oxygen)”
t0“Tomato”
Claim · model-written summary
Fourteen days of hypoxia increased shoot dry weight.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- root hypoxia (1–2 % oxygen)e1
- Outcome
- shoot DWe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“14 days of treatment caused decreased root dry weight (DW) with a concomitant increase in shoot DW”
e1“root hypoxia (1–2 % oxygen)”
t0“Tomato”
Claim · model-written summary
Hypoxia significantly decreased stomatal conductance and chlorophyll content in L3.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- L3e0
- Treatment
- Root hypoxiae0
- Outcome
- g s and chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root hypoxia significantly decreased g s and chlorophyll content of L3”
t0“Tomato”
Claim · model-written summary
Hypoxia had no noted effect on L1 stomatal conductance and chlorophyll content.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- L1e0
- Treatment
- Root hypoxiae1
- Outcome
- g s and chlorophyll contente1
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but no effects were noted for L1”
e1“Root hypoxia significantly decreased g s and chlorophyll content of L3”
t0“Tomato”
Claim · model-written summary
Hypoxia significantly reduced leaf area in L1 and L3.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- L1 and L3e0
- Treatment
- root hypoxia (1–2 % oxygen)e1
- Outcome
- LAe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LA was significantly reduced for L1 and L3”
e1“root hypoxia (1–2 % oxygen)”
t0“Tomato”
Claim · model-written summary
Hypoxia significantly increased leaf mass per area.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- root hypoxia (1–2 % oxygen)e1
- Outcome
- LMAe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LMA which was significantly increased”
e1“root hypoxia (1–2 % oxygen)”
t0“Tomato”
Claim · model-written summary
Hypoxia decreased flower production.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- root hypoxiae0
- Outcome
- flower and fruit productione0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root hypoxia resulted in a decrease in flower and fruit production”
t0“Tomato”
Claim · model-written summary
Hypoxia accelerated entry into fruit expansion.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- root hypoxiae1
- Outcome
- entrance in the fruit expansion phasee0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accelerated the entrance in the fruit expansion phase”
e1“root hypoxia resulted”
t0“Tomato”
Claim · model-written summary
Hypoxia did not affect fruit growth rate or final fruit size.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- root hypoxiae1
- Outcome
- rate of fruit growth, nor the final fruit sizee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not affect the rate of fruit growth, nor the final fruit size”
e1“root hypoxia resulted”
t0“Tomato”
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See all 6 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.