Abstract
Drought tolerance was evaluated in twelve cultivars of three ornamental Tagetes species (T. patula, T. tenuifolia and T. erecta). A stress treatment was performed by completely stopping watering of plants maintained in controlled greenhouse conditions. After three weeks, several plant growth parameters (stem length (SL), fresh weight (FW) and water content (WC)), photosynthetic pigments (chlorophylls and carotenoids (Car)), osmolytes (proline (Pro), glycine betaine (GB) and total soluble sugars (TSS)), an oxidative stress maker (malondialdehyde (MDA)) and antioxidants (total phenolic compounds (TPC) and total flavonoids (TF)) were measured. Considerable differences in the evaluated traits were found among the control and drought-stressed plants. Drought stress generally caused a marked reduction in plant growth and carotenoid pigments, and an increase in soluble solutes and oxidative stress. For most cultivars, proline levels in stressed plants increased between 30 and 70-fold compared to the corresponding controls. According to the different measured parameters, on average T. erecta proved to be more tolerant to drought than T. patula and T. tenuifolia. However, a considerable variation in the tolerance to drought was found within each species. The traits with greater association to drought tolerance as well as the most tolerant cultivars could be clearly identified in a principal components analysis (PCA). Overall, our results indicate that drought tolerant cultivars of Tagetes can be identified at early stages using a combination of plant growth and biochemical markers.
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Claims 7
Claim · model-written summary
Drought reduced plant growth and carotenoid pigments in Tagetes under controlled greenhouse conditions.
- Treatment
- Drought stresse1
- Outcome
- plant growth and carotenoid pigmentse1
- Direction
- reductione1
- Comparator
- corresponding controlse2
- Setting
- controlled greenhouse conditionse0
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TagetesOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
t0“Screening for drought tolerance in cultivars of the ornamental genus Tagetes (Asteraceae)”
e0“A stress treatment was performed by completely stopping watering of plants maintained in controlled greenhouse conditions”
e1“Drought stress generally caused a marked reduction in plant growth and carotenoid pigments, and an increase in soluble solutes and oxidative stress”
e2“For most cultivars, proline levels in stressed plants increased between 30 and 70-fold compared to the corresponding controls”
Claim · model-written summary
Drought increased soluble solutes and oxidative stress in Tagetes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening for drought tolerance in cultivars of the ornamental genus Tagetes (Asteraceae)”
e1“Drought stress generally caused a marked reduction in plant growth and carotenoid pigments, and an increase in soluble solutes and oxidative stress”
Claim · model-written summary
In most Tagetes cultivars, proline levels in drought-stressed plants increased 30- to 70-fold over controls.
- Treatment
- stressed plantse2
- Outcome
- proline levelse2
- Direction
- increasede2
- Value
- between 30 and 70-folde2
- Qualifier
- For most cultivarse2
- Comparator
- corresponding controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening for drought tolerance in cultivars of the ornamental genus Tagetes (Asteraceae)”
e2“For most cultivars, proline levels in stressed plants increased between 30 and 70-fold compared to the corresponding controls”
Claim · model-written summary
On average, T. erecta was more tolerant to drought than T. patula and T. tenuifolia.
- Taxon
- T. erecta
Tagetes erectae3 - Outcome
- tolerant to droughte3
- Direction
- moree3
- Qualifier
- According to the different measured parameterse3
- Comparator
- T. patula and T. tenuifoliae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“According to the different measured parameters, on average T. erecta proved to be more tolerant to drought than T. patula and T. tenuifolia”
Claim · model-written summary
Drought tolerance varied considerably within each Tagetes species.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening for drought tolerance in cultivars of the ornamental genus Tagetes (Asteraceae)”
e4“However, a considerable variation in the tolerance to drought was found within each species”
Claim · model-written summary
Principal components analysis identified the traits most associated with drought tolerance and the most tolerant cultivars.
- Outcome
- traits with greater association to drought tolerancee5
- Comparator
- different measured parameterse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening for drought tolerance in cultivars of the ornamental genus Tagetes (Asteraceae)”
e5“The traits with greater association to drought tolerance as well as the most tolerant cultivars could be clearly identified in a principal components analysis (PCA)”
e3“According to the different measured parameters, on average T. erecta proved to be more tolerant to drought than T. patula and T. tenuifolia”
Claim · model-written summary
Drought tolerant Tagetes cultivars can be identified at early stages using plant growth and biochemical markers.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Screening for drought tolerance in cultivars of the ornamental genus Tagetes (Asteraceae)”
e6“Overall, our results indicate that drought tolerant cultivars of Tagetes can be identified at early stages using a combination of plant growth and biochemical markers”
The same questions in other papers
drought · physiology: pigments · Tagetes (marigolds)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.