Abstract
Abstract Experiments conducted m a phytotron on three rice varieties of different salinity tolerance revealed an increase in the content of endogenous abscisic acid (ABA) with increasing NaCl salinity in IR20 (semi salt‐tolerant), but in Pokkali (salt‐tolerant) and IR28 (salt‐sensitive) the increase in ABA content was marginal. Under sahnity stress, in general, 5 weekly sprayings of ABA (10 ‐4 mol L ‐1 ) decreased Na and K concentrations in the shoot to the extent of 29.5 % and 3.3 %, respectively. However, ABA application significantly improved the K/Na ratio as well as the chlorophyll fluorescence decrease ratio (Rfd, indicator for potential photosynthetic activity), the number of green leaves per plant and the shoot dry weight. The response of IR20 and IR28 to ABA application was significantly better than that of Pokkali. Increasing salinity caused marked nutrient imbalances, decreased Rfd values and shoot dry weight. The results are discussed in relation to possible mechanism of salinity tolerance.
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Claims 10
Claim · model-written summary
Endogenous ABA content increased with increasing NaCl salinity in IR20 rice.
- Taxon
- rice
Oryza sativae0 - Material
- IR20e1
- Treatment
- NaCl salinitye1
- Outcome
- content of endogenous abscisic acid (ABA)e1
- Direction
- increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e1“revealed an increase in the content of endogenous abscisic acid (ABA) with increasing NaCl salinity in IR20”
Claim · model-written summary
Endogenous ABA content in Pokkali rose only marginally under salinity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e2“in Pokkali (salt‐tolerant) and IR28 (salt‐sensitive) the increase in ABA content was marginal”
Claim · model-written summary
Endogenous ABA content in IR28 rose only marginally under salinity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e2“in Pokkali (salt‐tolerant) and IR28 (salt‐sensitive) the increase in ABA content was marginal”
Claim · model-written summary
Weekly ABA sprayings decreased shoot Na concentration by 29.5% under salinity.
- Taxon
- riceOryza sativae0
- Treatment
- 5 weekly sprayings of ABAe3
- Outcome
- Nae3
- Direction
- decreasede3
- Value
- 29.5 %e3
- Qualifier
- in the shoote3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e3“in general, 5 weekly sprayings of ABA (10 ‐4 mol L ‐1 ) decreased Na and K concentrations in the shoot to the extent of 29.5 % and 3.3 %, respectively”
Claim · model-written summary
Weekly ABA sprayings decreased shoot K concentration by 3.3% under salinity.
- Taxon
- riceOryza sativae0
- Treatment
- 5 weekly sprayings of ABAe3
- Outcome
- Ke3
- Direction
- decreasede3
- Value
- 3.3 %e3
- Qualifier
- in the shoote3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e3“in general, 5 weekly sprayings of ABA (10 ‐4 mol L ‐1 ) decreased Na and K concentrations in the shoot to the extent of 29.5 % and 3.3 %, respectively”
Claim · model-written summary
ABA application improved the K/Na ratio and the Rfd under salinity.
- Taxon
- riceOryza sativae0
- Treatment
- ABA applicatione4
- Outcome
- K/Na ratio as well as the chlorophyll fluorescence decrease ratioe4
- Direction
- improvede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e4“ABA application significantly improved the K/Na ratio as well as the chlorophyll fluorescence decrease ratio (Rfd, indicator for potential photosynthetic activity), the number of green leaves per plant and the shoot dry weight”
Claim · model-written summary
ABA application improved the number of green leaves per plant and the shoot dry weight under salinity.
- Taxon
- riceOryza sativae0
- Treatment
- ABA applicatione4
- Outcome
- the number of green leaves per plant and the shoot dry weighte4
- Direction
- improvede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e4“ABA application significantly improved the K/Na ratio as well as the chlorophyll fluorescence decrease ratio (Rfd, indicator for potential photosynthetic activity), the number of green leaves per plant and the shoot dry weight”
Claim · model-written summary
IR20 and IR28 responded significantly better to ABA application than Pokkali.
- Taxon
- riceOryza sativae0
- Material
- IR20 and IR28e5
- Treatment
- ABA applicatione5
- Outcome
- The response of IR20 and IR28 to ABA applicatione5
- Direction
- bettere5
- Comparator
- Pokkalie5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e5“The response of IR20 and IR28 to ABA application was significantly better than that of Pokkali”
Claim · model-written summary
Increasing salinity decreased Rfd values and shoot dry weight.
- Taxon
- riceOryza sativae0
- Treatment
- Increasing salinitye6
- Outcome
- Rfd values and shoot dry weighte6
- Direction
- decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e6“Increasing salinity caused marked nutrient imbalances, decreased Rfd values and shoot dry weight”
Claim · model-written summary
Increasing salinity caused marked nutrient imbalances in rice.
- Taxon
- riceOryza sativae0
- Treatment
- Increasing salinitye6
- Outcome
- nutrient imbalancese6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments conducted m a phytotron on three rice varieties of different salinity tolerance”
e6“Increasing salinity caused marked nutrient imbalances, decreased Rfd values and shoot dry weight”
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