Abstract
Peanut (Arachis hypogaea L.), an improtant oil crop, usually encounters drought stress in the process of growth and development, especially at pre-flowering stage. In order to gain insight into the drought tolerance potentials based on osmolyte accumulation and metabolism of proline aspects of peanut, pot experiments were conducted with a split-plot design in Tai'an, Shangdong Province, China in 2013 and 2014. Pre-flowering drought (PFD) stress and optinum irrigation (control, CK) were served as the main plots and the two peanut cultivars Shanhua 11 and Hua 17 served as sub-plots. Shanhua 11 was drought-tolerant cultivar and Hua 17 was drought-sensitive. The content of soluble sugars, soluble protein, free proline and other free amino acids, the activities of enzymes involved in proline metabolism, and malondialdehyde (MDA) content and ion leakage were all investigated in the two cultivars at pre-flowering stage. Results showed that PFD stress significantly increased the levels of soluble protein, free proline and free amino acid, and increased Δ1-pyrroline-5-carboxylate synthetase (P-5-CS, EC 2.7.2.11) activity in the leaves of drought-tolerant and drought-sensitive cultivars. The activity of proline dehydrogenase (proDH) (EC 1.5.99.8) decreased under PFD stress in both cultivars. The leaves of the tolerant cultivar maintained higher increments of osmolyte levels, lower increments of MDA content and ion leakage, as well as a higher increased proportion of P-5-CS activity and higher inhibited proportion of proDH activity under water stress compared with the drought-sensitive cultivar. The study suggests that proline accumulation in peanut leaves under PFD can be explained by the higher enhanced activities of P-5-CS and higher inhibition of proDH. The results will provide useful information for genetic improvement of peanut under drought tolerance.
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Claims 8
Claim · model-written summary
Pre-flowering drought increased soluble protein, free proline and free amino acid levels in leaves of both cultivars.
- Taxon
- peanut
Arachis hypogaeat0 - Organ / stage
- leavest0
- Treatment
- PFD stresse0
- Outcome
- soluble protein, free proline and free amino acide0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PFD stress significantly increased the levels of soluble protein, free proline and free amino acid”
t0“leaves of peanut (Arachis hypogaea L.)”
Claim · model-written summary
Pre-flowering drought increased P-5-CS activity in leaves of both cultivars.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- PFD stresse0
- Gene
- Δ1-pyrroline-5-carboxylate synthetasee0
- Outcome
- P-5-CS, EC 2.7.2.11) activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PFD stress significantly increased the levels of soluble protein, free proline and free amino acid, and increased Δ1-pyrroline-5-carboxylate synthetase (P-5-CS, EC 2.7.2.11) activity in the leaves of drought-tolerant and drought-sensitive cultivars”
t0“peanut (Arachis hypogaea L.)”
Claim · model-written summary
Proline dehydrogenase activity decreased under pre-flowering drought in both cultivars.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- PFD stresse0
- Gene
- proline dehydrogenasee0
- Outcome
- proline dehydrogenase (proDH) (EC 1.5.99.8)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of proline dehydrogenase (proDH) (EC 1.5.99.8) decreased under PFD stress in both cultivars”
t0“peanut (Arachis hypogaea L.)”
Claim · model-written summary
The tolerant cultivar maintained higher increments of osmolyte levels than the drought-sensitive cultivar under water stress.
- Taxon
- peanutArachis hypogaeat0
- Material
- tolerant cultivare0
- Treatment
- water stresse0
- Outcome
- osmolyte levelse0
- Direction
- highere0
- Comparator
- drought-sensitive cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaves of the tolerant cultivar maintained higher increments of osmolyte levels, lower increments of MDA content and ion leakage, as well as a higher increased proportion of P-5-CS activity and higher inhibited proportion of proDH activity under water stress compared with the drought-sensitive cultivar”
t0“peanut (Arachis hypogaea L.)”
Claim · model-written summary
The tolerant cultivar maintained lower increments of MDA content and ion leakage than the drought-sensitive cultivar under water stress.
- Taxon
- peanutArachis hypogaeat0
- Material
- tolerant cultivare0
- Treatment
- water stresse0
- Outcome
- MDA content and ion leakagee0
- Direction
- lowere0
- Comparator
- drought-sensitive cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaves of the tolerant cultivar maintained higher increments of osmolyte levels, lower increments of MDA content and ion leakage, as well as a higher increased proportion of P-5-CS activity and higher inhibited proportion of proDH activity under water stress compared with the drought-sensitive cultivar”
t0“peanut (Arachis hypogaea L.)”
Claim · model-written summary
The tolerant cultivar showed a higher increased proportion of P-5-CS activity under water stress.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- water stresse0
- Gene
- P-5-CSe0
- Outcome
- P-5-CS activitye0
- Direction
- highere0
- Comparator
- drought-sensitive cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher increased proportion of P-5-CS activity and higher inhibited proportion of proDH activity under water stress compared with the drought-sensitive cultivar”
t0“peanut (Arachis hypogaea L.)”
Claim · model-written summary
The tolerant cultivar showed a higher inhibited proportion of proDH activity under water stress.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- water stresse0
- Gene
- proDHe0
- Outcome
- proDH activitye0
- Direction
- higher inhibitede0
- Comparator
- drought-sensitive cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher inhibited proportion of proDH activity under water stress compared with the drought-sensitive cultivar”
t0“peanut (Arachis hypogaea L.)”
Claim · model-written summary
The authors attribute proline accumulation under drought to enhanced P-5-CS activity and inhibited proDH activity.
- Taxon
- peanutArachis hypogaeae0
- Gene
- P-5-CSe0
- Outcome
- proline accumulatione0
- Qualifier
- higher inhibition of proDHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline accumulation in peanut leaves under PFD can be explained by the higher enhanced activities of P-5-CS and higher inhibition of proDH”
The same questions in other papers
drought · physiology: osmolytes · Arachis hypogaea (peanut)Results differ
8 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 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.