Abstract
To increase crop yields and not to compete for land with food crops, intercropping agricultural cultivation approach was introduced into cultivation of peanut (Arachis hypogaca L.). This approach improves the total yield of the crop per unit area, but decreases the yield of a single crop compared with mono-cropped agricultural cultivation approach. In wheat-peanut relay intercropping system, peanut plants would suffer heat and high light (HI) stress after wheat harvest. In the present work, peanut seedlings were cultivated in low light to simulate wheat-peanut relay intercropping environments. Upon exposure to heat and HI stress, energy dissipation in PSII complexes was evaluated by comparing those cultivated in low irradiance conditions with the mono-cropped peanut. The maximal photochemical efficiency of PSII (F v/F m) and the net photosynthetic rate (P n) decreased markedly in relay-cropped peanut (RP) after heat and HI stress, accompanied by higher degree of PSII reaction center closure (1–qP). After heat and HI stress, higher antioxidant enzyme activity and less ROS accumulation were observed in mono-cropped peanut (MP) seedlings. Meanwhile, higher content of D1 protein and higher ratio of (A + Z)/(V + A + Z) were also detected in MP plants under such stress. These results implied that heat and HI stress could induce photoinhibition of PSII reaction centers in peanut seedlings and both xanthophyll cycle-dependent thermal energy dissipation and the antioxidant system were down-regulated in RP compared to classical monocropping systems after heat and high irradiance stress.
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Claims 10
Claim · model-written summary
Intercropping improved total crop yield per area.
- Taxon
- peanut
Arachis hypogaeat0 - Outcome
- total yield of the crop per unit areae0
- Direction
- improvese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut”
e0“This approach improves the total yield of the crop per unit area”
Claim · model-written summary
Intercropping decreased single-crop yield versus monocropping.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- yield of a single crope0
- Direction
- decreasese0
- Comparator
- mono-cropped agricultural cultivation approache0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut”
e0“decreases the yield of a single crop compared with mono-cropped agricultural cultivation approach”
Claim · model-written summary
Heat and high irradiance markedly decreased PSII maximal photochemical efficiency and net photosynthesis in relay-cropped peanut.
- Taxon
- peanutArachis hypogaeae0
- Material
- relay-cropped peanut (RP)e0
- Treatment
- heat and HI stresse0
- Outcome
- maximal photochemical efficiency of PSII (F v/F m) and the net photosynthetic rate (P n)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximal photochemical efficiency of PSII (F v/F m) and the net photosynthetic rate (P n) decreased markedly in relay-cropped peanut (RP) after heat and HI stress”
Claim · model-written summary
PSII reaction-center closure was higher in stressed relay-cropped peanut.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- PSII reaction center closure (1–qP)e0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut”
e0“accompanied by higher degree of PSII reaction center closure (1–qP)”
Claim · model-written summary
Stressed mono-cropped peanut had higher antioxidant enzyme activity.
- Taxon
- peanutArachis hypogaeae0
- Material
- mono-cropped peanut (MP)e0
- Outcome
- antioxidant enzyme activitye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher antioxidant enzyme activity and less ROS accumulation were observed in mono-cropped peanut (MP) seedlings”
Claim · model-written summary
Stressed mono-cropped peanut had less ROS accumulation.
- Taxon
- peanutArachis hypogaeae0
- Material
- mono-cropped peanut (MP)e0
- Outcome
- ROS accumulatione0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher antioxidant enzyme activity and less ROS accumulation were observed in mono-cropped peanut (MP) seedlings”
Claim · model-written summary
Stressed mono-cropped peanut had higher D1 protein content.
- Taxon
- peanutArachis hypogaeat0
- Material
- MPe0
- Gene
- D1 proteine0
- Outcome
- content of D1 proteine0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut”
e0“higher content of D1 protein and higher ratio of (A + Z)/(V + A + Z) were also detected in MP plants under such stress”
Claim · model-written summary
Stressed mono-cropped peanut had a higher (A + Z)/(V + A + Z) ratio.
- Taxon
- peanutArachis hypogaeat0
- Material
- MPe0
- Outcome
- ratio of (A + Z)/(V + A + Z)e0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut”
e0“higher content of D1 protein and higher ratio of (A + Z)/(V + A + Z) were also detected in MP plants under such stress”
Claim · model-written summary
The authors infer that heat and high irradiance induce PSII photoinhibition in peanut seedlings.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- heat and HI stresse0
- Outcome
- photoinhibition of PSII reaction centerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat and HI stress could induce photoinhibition of PSII reaction centers in peanut seedlings”
Claim · model-written summary
The authors infer that xanthophyll cycle-dependent thermal dissipation and the antioxidant system were down-regulated in relay-cropped peanut.
- Taxon
- peanutArachis hypogaeat0
- Material
- RPe0
- Outcome
- xanthophyll cycle-dependent thermal energy dissipation and the antioxidant systeme0
- Direction
- down-regulatede0
- Qualifier
- after heat and high irradiance stresse0
- Comparator
- classical monocropping systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut”
e0“both xanthophyll cycle-dependent thermal energy dissipation and the antioxidant system were down-regulated in RP compared to classical monocropping systems after heat and high irradiance stress”
The same questions in other papers
light · physiology: photosynthesis · Arachis hypogaea (peanut)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
heat · physiology: photosynthesis · Arachis hypogaea (peanut)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.