Abstract
Onion (Allium cepa L.) has huge importance due to its health benefits.Salinity and drought stress appear to be the major threats towards the productivity of crops and vegetables across the globe.Although in literature several studies summarize responses of agricultural crops to abiotic stresses but data for onion appears to be limited.In this greenhouse study, seven onion cultivars were compared for their morphological and physiological responses to salinity stress (SS) and drought stress (DS).Salinity stress was applied to SS group through irrigating with water containing increasing doses of NaCl (100, 125, 150, 175 and 200 mM) in 3-day intervals, whereas water was suspended for 20 days to DS group for drought stress application.Salinity and drought stress decreased photosynthetic rate, lower leaf number, leaf length and bulb yield.SS interfered with root length and diameter, whereas thicker and elongated root length was noticed in response to DS.The cultivars 'Elit', 'Hazar' and 'Sampiyon' exhibited the reduction in photosynthetic rate.Maximum damage to chlorophyll contents was observed in cultivars 'Hazar' and 'Sampiyon' under SS and DS conditions.The cultivar 'Perama' manifested the highest bulb weight under SS and DS condition.The cultivars 'Perama' and 'Seyhan' were referred to as tolerant based on their overall performance under SS and DS, supported by the results of principal component analysis (PCA), however, the cultivars 'Elit', 'Hazar', and 'Sampiyon' performed poorly, so grouped as sensitive cultivars.Results of this study can be helpful in screening of tolerant and susceptible onion cultivars which will be useful for future breeding programs.
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Claims 12
Claim · model-written summary
Salinity and drought reduced onion photosynthetic rate.
- Taxon
- Onion
Allium cepat0 - Treatment
- Salinity and drought stresse0
- Outcome
- photosynthetic ratee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity and drought stress decreased photosynthetic rate, lower leaf number, leaf length and bulb yield.”
t0“Onion Cultivars”
Claim · model-written summary
Salinity and drought reduced onion leaf number and leaf length.
- Taxon
- OnionAllium cepat0
- Treatment
- Salinity and drought stresse0
- Outcome
- leaf number, leaf lengthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity and drought stress decreased photosynthetic rate, lower leaf number, leaf length and bulb yield.”
t0“Onion Cultivars”
Claim · model-written summary
Salinity and drought reduced onion bulb yield.
- Taxon
- OnionAllium cepat0
- Treatment
- Salinity and drought stresse0
- Outcome
- bulb yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity and drought stress decreased photosynthetic rate, lower leaf number, leaf length and bulb yield.”
t0“Onion Cultivars”
Claim · model-written summary
Salinity stress interfered with onion root length and diameter.
- Taxon
- OnionAllium cepat0
- Treatment
- SSe0
- Outcome
- root length and diametere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SS interfered with root length and diameter”
t0“Onion Cultivars”
Claim · model-written summary
Drought stress produced thicker, elongated onion roots.
- Taxon
- OnionAllium cepat0
- Treatment
- DSe0
- Outcome
- root lengthe0
- Direction
- elongatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thicker and elongated root length was noticed in response to DS”
t0“Onion Cultivars”
Claim · model-written summary
Elit showed reduced photosynthetic rate.
- Taxon
- OnionAllium cepat0
- Material
- Elite0
- Outcome
- photosynthetic ratee0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivars 'Elit', 'Hazar' and 'Sampiyon' exhibited the reduction in photosynthetic rate.”
t0“Onion Cultivars”
Claim · model-written summary
Hazar showed reduced photosynthetic rate.
- Taxon
- OnionAllium cepat0
- Material
- Hazare0
- Outcome
- photosynthetic ratee0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivars 'Elit', 'Hazar' and 'Sampiyon' exhibited the reduction in photosynthetic rate.”
t0“Onion Cultivars”
Claim · model-written summary
Sampiyon showed reduced photosynthetic rate.
- Taxon
- OnionAllium cepat0
- Material
- Sampiyone0
- Outcome
- photosynthetic ratee0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivars 'Elit', 'Hazar' and 'Sampiyon' exhibited the reduction in photosynthetic rate.”
t0“Onion Cultivars”
Claim · model-written summary
Hazar and Sampiyon sustained the maximum chlorophyll damage under salinity and drought.
- Taxon
- OnionAllium cepat0
- Material
- Hazare0
- Treatment
- SS and DSe0
- Outcome
- chlorophyll contentse0
- Direction
- Maximum damagee0
- Qualifier
- Sampiyone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum damage to chlorophyll contents was observed in cultivars 'Hazar' and 'Sampiyon' under SS and DS conditions.”
t0“Onion Cultivars”
Claim · model-written summary
Perama had the highest bulb weight under salinity and drought.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivar 'Perama' manifested the highest bulb weight under SS and DS condition.”
t0“Onion Cultivars”
Claim · model-written summary
Perama and Seyhan were classified as tolerant under salinity and drought.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivars 'Perama' and 'Seyhan' were referred to as tolerant based on their overall performance under SS and DS”
t0“Onion Cultivars”
Claim · model-written summary
Elit, Hazar, and Sampiyon were classified as sensitive.
- Taxon
- OnionAllium cepat0
- Material
- Elite0
- Outcome
- sensitive cultivarse0
- Qualifier
- Hazare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cultivars 'Elit', 'Hazar', and 'Sampiyon' performed poorly, so grouped as sensitive cultivars”
t0“Onion Cultivars”
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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.