Abstract
Water deficit (drought) during the summer season is one of the major production constraints for maize (Zea mays L.) in large areas of Southeast Asia. Identification and development of varieties capable of withstanding the stress conditions could be an ideal and affordable approach suitable for resource to poor maize-growing farmers of such areas. The present study was undertaken on artificially induced water stress of maize in vitro, where stress was applied with PEG-6000 on one week old seedlings of six varieties of maize-30V92, BN 1133, Kaveri-Super 244, BN 101, Dhanya and Swarna, and for 3, 5 and 7 days. Assay of antioxidative enzymes revealed that peroxidase activities decreased on the 7th day of water stress in BN 1133, Dhanya, 30V92 and Swarna but in BN 101 and Super 244 the activity increased with period of stress. Ascorbate peroxidase and superoxide dismutase activities increased initially and then declined. Catalase activity declined at all periods of stress in BN 1133, Dhanya, 30V92 and Swarna while the other two varieties showed an increase during stress. Chlorophyll content showed a decline during the period of drought when compared to the control plants of all varieties. With the increase in the intensity of drought there was an increase in both proline and ascorbate content in all varieties. H2O2 accumulation and lipid peroxidation showed an increase during stress in BN 1133, Dhanya, 30V92 and Swarna but no increase was seen in the other two varieties. Water stress induced decrease in RWC was greater in BN 1133, Dhanya and Swarna. Thus enzymatic activity and biochemical tests showed that BN 1133, Dhanya, 30V92 and Swarna are more susceptible to drought stress than KS 244 and BN 101 which are the tolerant varieties.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-sa. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Peroxidase activity fell on day seven in BN 1133, Dhanya, 30V92 and Swarna.
- Material
- BN 1133, Dhanya, 30V92 and Swarnae0
- Organ / stage
- 7th daye0
- Treatment
- water stresse0
- Outcome
- peroxidase activitiese0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peroxidase activities decreased on the 7th day of water stress in BN 1133, Dhanya, 30V92 and Swarna”
t0“Maize”
Claim · model-written summary
Peroxidase activity rose with stress duration in BN 101 and Super 244.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in BN 101 and Super 244 the activity increased with period of stress”
t0“Maize”
Claim · model-written summary
Ascorbate peroxidase and superoxide dismutase activity rose initially and later declined.
- Outcome
- Ascorbate peroxidase and superoxide dismutase activitiese0
- Direction
- increased initially and then declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ascorbate peroxidase and superoxide dismutase activities increased initially and then declined”
t0“Maize”
Claim · model-written summary
Catalase declined at all stress periods in BN 1133, Dhanya, 30V92 and Swarna.
- Material
- BN 1133, Dhanya, 30V92 and Swarnae0
- Treatment
- stresse0
- Outcome
- Catalase activitye0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Catalase activity declined at all periods of stress in BN 1133, Dhanya, 30V92 and Swarna”
t0“Maize”
Claim · model-written summary
Catalase rose during stress in the other two varieties.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the other two varieties showed an increase during stress”
t0“Maize”
Claim · model-written summary
Chlorophyll content declined under drought versus controls in all varieties.
- Material
- all varietiese0
- Treatment
- droughte0
- Outcome
- Chlorophyll contente0
- Direction
- declinee0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content showed a decline during the period of drought when compared to the control plants of all varieties”
t0“Maize”
Claim · model-written summary
Proline and ascorbate content increased with drought intensity in all varieties.
- Material
- all varietiese0
- Treatment
- intensity of droughte0
- Outcome
- proline and ascorbate contente0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the increase in the intensity of drought there was an increase in both proline and ascorbate content in all varieties”
t0“Maize”
Claim · model-written summary
Hydrogen peroxide accumulation and lipid peroxidation rose with stress in four varieties.
- Material
- BN 1133, Dhanya, 30V92 and Swarnae0
- Treatment
- stresse0
- Outcome
- H2O2 accumulation and lipid peroxidatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H2O2 accumulation and lipid peroxidation showed an increase during stress in BN 1133, Dhanya, 30V92 and Swarna”
t0“Maize”
Claim · model-written summary
The other two varieties showed no increase in hydrogen peroxide accumulation or lipid peroxidation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but no increase was seen in the other two varieties”
t0“Maize”
Claim · model-written summary
Water stress reduced relative water content more in BN 1133, Dhanya and Swarna.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress induced decrease in RWC was greater in BN 1133, Dhanya and Swarna”
t0“Maize”
Claim · model-written summary
BN 1133, Dhanya, 30V92 and Swarna were judged more drought susceptible than KS 244 and BN 101.
- Material
- BN 1133, Dhanya, 30V92 and Swarnae0
- Outcome
- susceptible to drought stresse0
- Direction
- moree0
- Comparator
- KS 244 and BN 101e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BN 1133, Dhanya, 30V92 and Swarna are more susceptible to drought stress than KS 244 and BN 101 which are the tolerant varieties”
t0“Maize”
The same questions in other papers
drought · physiology: antioxidant enzymes · Zea mays (maize)Results differ
27 papers in the same direction as this paper · 32 in the opposite direction
- positive
- positive
- positive
56 papers more in this group
See all 60 papers →drought · physiology: pigments · Zea mays (maize)Positive and negative results
74 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
81 papers more in this group
See all 85 papers →drought · physiology: water · Zea mays (maize)Positive and negative results
115 papers in the same direction as this paper · 39 in the opposite direction
- positive
- positive
- positive
151 papers more in this group
See all 155 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.