Abstract
Peanut is one of the ideal crops in dry farming.Drought is the main limit factor of peanut to increase yield and improve quality.Seedling stage is constantly hit by drought for summer peanut.In order to understand the suitable watering amount at peanut seedling stage,provide theoretical basis and technique for dry farming peanut producing the experiment was conducted with drought light-resistant peanut cv.Luhua 11 and drought resistant peanut cv.Nongda 818 from 2003 to 2004 in the experimental station of Shandong Agricultural University.Five treatments with watering 20 mm(serious drought stress),40 mm(middle drought stress),60 mm(slight-middle drought stress),80 mm(slight drought stress), and 100 mm(CK) were made at 10 days after seedling(27 June) with three replicates in a randomized block design.The drought stress stopped at full-bloom stage(20 July) and then all treatments were irrigated 100 mm water at full-bloom stage,pod-setting stage and pod filling stage separately.The results showed that the photosynthesis rate(P_n) decreased,and malondialdeyde(MDA) content increased remarkably with the drought degree raising.After rewatering,the MDA content decreased and P_n returned to the level of check rapidly,the recovery ability of Nongda 818 was bigger than that of Luhua 11.Suitable drought treatment could enhance the activities of superoxide dismutase(SOD),peroxidase(POD) and catalase(CAT),and increase the soluble protein content.The highest activities of SOD,POD,CAT,and soluble protein content presented at the slight-middle drought treatment(watering 6080 mm) for Luhua 11,but at the middle drought treatment(watering 4060 mm) for Nongda 818.At the same drought treatment,especially at serious drought treatment(watering 20 mm),the activities of SOD,POD,CAT of Nongda 818 were significantly higher than those of Luhua 11.After rewatering,the activities of SOD,POD,CAT and soluble protein content reduced significantly,but the activities of SOD,POD,CAT of Nongda 818 were still higher than those of Luhua 11.With the drought degree raising,pod and kernel yields substantially decreased and the yield losses of Nongda 818 were less than that of Luhua 11.The irrigating amount at peanut seedling stage is no less than 6080 mm to avoid the yield loss.Middle and slight drought stress at seedling stage could increase the protein content of peanut kernel,and have a little effect on fat content.Serious drought stress at seedling stage decreased oleic content and the ratio of oleic/linoleic(O/L) significantly,increased linoleic content of peanut kernel,and had a little effect on protein content.The optimal irrigating amount at seedling stage for the best kernel quality of Luhua 11 is 6080 mm and that of Nongda 818 is 4060 mm.
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Claims 20
Claim · model-written summary
Photosynthesis rate decreased as drought intensified.
- Taxon
- Peanut
Arachis hypogaeat0 - Treatment
- drought degreee0
- Outcome
- photosynthesis rate(P_n)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the photosynthesis rate(P_n) decreased,and malondialdeyde(MDA) content increased remarkably with the drought degree raising”
t0“Peanut”
Claim · model-written summary
MDA content increased as drought intensified.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- drought degreee0
- Outcome
- malondialdeyde(MDA) contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the photosynthesis rate(P_n) decreased,and malondialdeyde(MDA) content increased remarkably with the drought degree raising”
t0“Peanut”
Claim · model-written summary
After rewatering, MDA content decreased.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- rewateringe0
- Outcome
- MDA contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After rewatering,the MDA content decreased and P_n returned to the level of check rapidly”
t0“Peanut”
Claim · model-written summary
After rewatering, photosynthesis rapidly returned to the check level.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After rewatering,the MDA content decreased and P_n returned to the level of check rapidly”
t0“Peanut”
Claim · model-written summary
Nongda 818 recovered more strongly than Luhua 11.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Nongda 818e0
- Outcome
- recovery abilitye0
- Direction
- biggere0
- Comparator
- Luhua 11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the recovery ability of Nongda 818 was bigger than that of Luhua 11”
t0“Peanut”
Claim · model-written summary
Suitable drought enhanced SOD, POD and CAT activities.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Suitable drought treatmente0
- Outcome
- activities of superoxide dismutase(SOD),peroxidase(POD) and catalase(CAT)e0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suitable drought treatment could enhance the activities of superoxide dismutase(SOD),peroxidase(POD) and catalase(CAT)”
t0“Peanut”
Claim · model-written summary
Suitable drought increased soluble protein content.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- soluble protein contente0
- Direction
- increasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase the soluble protein content”
t0“Peanut”
Claim · model-written summary
Luhua 11 had maximum SOD, POD, CAT and soluble protein under slight-middle drought.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Luhua 11e0
- Treatment
- slight-middle drought treatment(watering 6080 mm)e0
- Outcome
- activities of SOD,POD,CAT,and soluble protein contente0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest activities of SOD,POD,CAT,and soluble protein content presented at the slight-middle drought treatment(watering 6080 mm) for Luhua 11”
t0“Peanut”
Claim · model-written summary
Nongda 818 had maximum SOD, POD, CAT and soluble protein under middle drought.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Nongda 818e0
- Treatment
- middle drought treatment(watering 4060 mm)e0
- Outcome
- activities of SOD,POD,CAT,and soluble protein contente1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but at the middle drought treatment(watering 4060 mm) for Nongda 818”
e1“The highest activities of SOD,POD,CAT,and soluble protein content presented”
t0“Peanut”
Claim · model-written summary
Nongda 818 had significantly higher SOD, POD and CAT than Luhua 11 at the same drought treatment.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Nongda 818e0
- Outcome
- activities of SOD,POD,CATe0
- Direction
- highere0
- Comparator
- Luhua 11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of SOD,POD,CAT of Nongda 818 were significantly higher than those of Luhua 11”
t0“Peanut”
Claim · model-written summary
Rewatering significantly reduced SOD, POD, CAT and soluble protein.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- rewateringe0
- Outcome
- activities of SOD,POD,CAT and soluble protein contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After rewatering,the activities of SOD,POD,CAT and soluble protein content reduced significantly”
t0“Peanut”
Claim · model-written summary
After rewatering, Nongda 818 retained higher SOD, POD and CAT than Luhua 11.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Nongda 818e0
- Outcome
- activities of SOD,POD,CATe0
- Direction
- highere0
- Comparator
- Luhua 11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of SOD,POD,CAT of Nongda 818 were still higher than those of Luhua 11”
t0“Peanut”
Claim · model-written summary
Pod and kernel yields fell substantially as drought intensified.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- drought degreee0
- Outcome
- pod and kernel yieldse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the drought degree raising,pod and kernel yields substantially decreased”
t0“Peanut”
Claim · model-written summary
Nongda 818 had smaller yield losses than Luhua 11.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Nongda 818e0
- Outcome
- yield lossese0
- Direction
- lesse0
- Comparator
- Luhua 11e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield losses of Nongda 818 were less than that of Luhua 11”
t0“Peanut”
Claim · model-written summary
Seedling irrigation of no less than 6080 mm was recommended to avoid yield loss.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- irrigating amount at peanut seedling stage is no less than 6080 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The irrigating amount at peanut seedling stage is no less than 6080 mm to avoid the yield loss”
t0“Peanut”
Claim · model-written summary
Middle and slight drought increased kernel protein.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Middle and slight drought stresse0
- Outcome
- protein content of peanut kernele0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Middle and slight drought stress at seedling stage could increase the protein content of peanut kernel”
t0“Peanut”
Claim · model-written summary
Middle and slight drought had little effect on kernel fat.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- fat contente0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“have a little effect on fat content”
t0“Peanut”
Claim · model-written summary
Serious drought decreased oleic content and the oleic/linoleic ratio.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- Serious drought stresse0
- Outcome
- oleic content and the ratio of oleic/linoleic(O/L)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Serious drought stress at seedling stage decreased oleic content and the ratio of oleic/linoleic(O/L) significantly”
t0“Peanut”
Claim · model-written summary
Serious drought increased kernel linoleic content.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- linoleic content of peanut kernele0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased linoleic content of peanut kernel”
t0“Peanut”
Claim · model-written summary
Optimal seedling irrigation for best kernel quality was 6080 mm for Luhua 11 and 4060 mm for Nongda 818.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- optimal irrigating amount at seedling stage for the best kernel qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal irrigating amount at seedling stage for the best kernel quality of Luhua 11 is 6080 mm and that of Nongda 818 is 4060 mm”
t0“Peanut”
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