Abstract
Terminal drought causes major yield loss in chickpea, so it is imperative to identify genotypes with best suited adaptive traits to secure yield in terminal drought-prone environments. Here, we evaluated chickpea (At) rd29A:: (At) DREB1A transgenic events (RD2, RD7, RD9 and RD10) and their untransformed C235 genotype for growth, water use and yield under terminal water-stress (WS) and well-watered (WW) conditions. The assessment was made across three lysimetric trials conducted in contained environments in the greenhouse (2009GH and 2010GH) and the field (2010F). Results from the greenhouse trials showed genotypic variation for harvest index (HI), yield, temporal pattern of flowering and seed filling, temporal pattern of water uptake across crop cycle, and transpiration efficiency (TE) under terminal WS conditions. The mechanisms underlying the yield gain in the WS transgenic events under 2009GH trial was related to conserving water for the reproductive stage in RD7, and setting seeds early in RD10. Water conservation also led to a lower percentage of flower and pod abortion in both RD7 and RD10. Similarly, in the 2010GH trial, reduced water extraction during vegetative stage in events RD2, RD7 and RD9 was critical for better seed filling in the pods produced from late flowers in RD2, and reduced percentage of flower and pod abortion in RD2 and RD9. However, in the 2010F trial, the increased seed yield and HI in RD9 compared with C235 came along only with small changes in water uptake and podding pattern, probably not causal. Events RD2 (2010GH), RD7 (2010GH) and RD10 (2009GH) with higher seed yield also had higher TE than C235. The results suggest that DREB1A, a transcription factor involved in the regulation of several genes of abiotic stress response cascade, influenced the pattern of water uptake and flowering across the crop cycle, leading to reduction in the percentage of flower and pod abortion in the glasshouse trials.
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Claims 15
Claim · model-written summary
In the 2009GH trial, yield gain in the transgenic events was related to conserving water for the reproductive stage in RD7
- Taxon
- chickpea
Cicer arietinume0 - Material
- RD7e1
- Outcome
- yield gaine1
- Qualifier
- conserving water for the reproductive stagee1
- Setting
- 2009GH triale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e1“The mechanisms underlying the yield gain in the WS transgenic events under 2009GH trial was related to conserving water for the reproductive stage in RD7, and setting seeds early in RD10”
Claim · model-written summary
In the 2009GH trial, yield gain in the transgenic events was related to setting seeds early in RD10
- Taxon
- chickpeaCicer arietinume0
- Material
- RD10e1
- Outcome
- yield gaine1
- Qualifier
- setting seeds earlye1
- Setting
- 2009GH triale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e1“The mechanisms underlying the yield gain in the WS transgenic events under 2009GH trial was related to conserving water for the reproductive stage in RD7, and setting seeds early in RD10”
Claim · model-written summary
Water conservation led to a lower percentage of flower and pod abortion in RD7
- Taxon
- chickpeaCicer arietinume0
- Material
- RD7e2
- Treatment
- Water conservatione2
- Outcome
- percentage of flower and pod abortione2
- Direction
- lowere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e2“Water conservation also led to a lower percentage of flower and pod abortion in both RD7 and RD10”
Claim · model-written summary
Water conservation led to a lower percentage of flower and pod abortion in RD10
- Taxon
- chickpeaCicer arietinume0
- Material
- RD10e2
- Treatment
- Water conservatione2
- Outcome
- percentage of flower and pod abortione2
- Direction
- lowere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e2“Water conservation also led to a lower percentage of flower and pod abortion in both RD7 and RD10”
Claim · model-written summary
In the 2010GH trial, reduced water extraction during vegetative stage in RD2 was critical for better seed filling in pods from late flowers
- Taxon
- chickpeaCicer arietinume0
- Material
- RD2e3
- Outcome
- better seed filling in the pods produced from late flowerse3
- Qualifier
- reduced water extraction during vegetative stagee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e3“reduced water extraction during vegetative stage in events RD2, RD7 and RD9 was critical for better seed filling in the pods produced from late flowers in RD2”
Claim · model-written summary
In the 2010GH trial, RD2 had a reduced percentage of flower and pod abortion
- Taxon
- chickpeaCicer arietinume0
- Material
- RD2e4
- Outcome
- percentage of flower and pod abortione4
- Direction
- reducede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e4“reduced percentage of flower and pod abortion in RD2 and RD9”
Claim · model-written summary
In the 2010GH trial, RD9 had a reduced percentage of flower and pod abortion
- Taxon
- chickpeaCicer arietinume0
- Material
- RD9e4
- Outcome
- percentage of flower and pod abortione4
- Direction
- reducede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e4“reduced percentage of flower and pod abortion in RD2 and RD9”
Claim · model-written summary
In the 2010F field trial, RD9 increased seed yield and harvest index compared with C235, with small changes in water uptake and podding pattern that were probably not causal
- Taxon
- chickpeaCicer arietinume0
- Material
- RD9e1
- Treatment
- rd29A:: (At) DREB1A transgenic eventse2
- Outcome
- seed yield and HIe1
- Direction
- increasede1
- Qualifier
- probably not causale1
- Comparator
- C235e2
- Setting
- field (2010F)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e2“chickpea (At) rd29A:: (At) DREB1A transgenic events (RD2, RD7, RD9 and RD10) and their untransformed C235 genotype”
e1“However, in the 2010F trial, the increased seed yield and HI in RD9 compared with C235 came along only with small changes in water uptake and podding pattern, probably not causal”
e3“the field (2010F)”
Claim · model-written summary
Events RD2 with higher seed yield had higher transpiration efficiency than C235 in the 2010GH trial
- Taxon
- chickpeaCicer arietinume0
- Material
- RD2e4
- Outcome
- TEe4
- Direction
- highere4
- Comparator
- C235e4
- Setting
- 2010GHe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e4“Events RD2 (2010GH), RD7 (2010GH) and RD10 (2009GH) with higher seed yield also had higher TE than C235”
Claim · model-written summary
Events RD7 with higher seed yield had higher transpiration efficiency than C235 in the 2010GH trial
- Taxon
- chickpeaCicer arietinume0
- Material
- RD7e4
- Outcome
- TEe4
- Direction
- highere4
- Comparator
- C235e4
- Setting
- 2010GHe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e4“Events RD2 (2010GH), RD7 (2010GH) and RD10 (2009GH) with higher seed yield also had higher TE than C235”
Claim · model-written summary
Event RD10 with higher seed yield had higher transpiration efficiency than C235 in the 2009GH trial
- Taxon
- chickpeaCicer arietinume0
- Material
- RD10e4
- Outcome
- TEe4
- Direction
- highere4
- Comparator
- C235e4
- Setting
- 2009GHe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e4“Events RD2 (2010GH), RD7 (2010GH) and RD10 (2009GH) with higher seed yield also had higher TE than C235”
Claim · model-written summary
DREB1A influenced the pattern of water uptake and flowering, leading to reduced flower and pod abortion in the glasshouse trials
- Taxon
- chickpeaCicer arietinume0
- Gene
- DREB1Ae5
- Outcome
- percentage of flower and pod abortione5
- Qualifier
- influenced the pattern of water uptake and flowering across the crop cyclee5
- Setting
- glasshouse trialse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e5“The results suggest that DREB1A, a transcription factor involved in the regulation of several genes of abiotic stress response cascade, influenced the pattern of water uptake and flowering across the crop cycle, leading to reduction in the percentage of flower and pod abortion in the glasshouse trials”
Claim · model-written summary
Greenhouse trials showed genotypic variation for harvest index and yield under terminal water stress
- Taxon
- chickpeaCicer arietinume0
- Outcome
- genotypic variation for harvest index (HI), yielde6
- Qualifier
- terminal WS conditionse6
- Setting
- greenhouse trialse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e6“Results from the greenhouse trials showed genotypic variation for harvest index (HI), yield, temporal pattern of flowering and seed filling, temporal pattern of water uptake across crop cycle, and transpiration efficiency (TE) under terminal WS conditions”
Claim · model-written summary
Greenhouse trials showed genotypic variation in the temporal pattern of flowering and seed filling under terminal water stress
- Taxon
- chickpeaCicer arietinume0
- Outcome
- temporal pattern of flowering and seed fillinge6
- Qualifier
- terminal WS conditionse6
- Setting
- greenhouse trialse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e6“Results from the greenhouse trials showed genotypic variation for harvest index (HI), yield, temporal pattern of flowering and seed filling, temporal pattern of water uptake across crop cycle, and transpiration efficiency (TE) under terminal WS conditions”
Claim · model-written summary
Greenhouse trials showed genotypic variation in water uptake pattern and transpiration efficiency under terminal water stress
- Taxon
- chickpeaCicer arietinume0
- Outcome
- temporal pattern of water uptake across crop cycle, and transpiration efficiency (TE)e6
- Qualifier
- terminal WS conditionse6
- Setting
- greenhouse trialse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“major yield loss in chickpea”
e6“Results from the greenhouse trials showed genotypic variation for harvest index (HI), yield, temporal pattern of flowering and seed filling, temporal pattern of water uptake across crop cycle, and transpiration efficiency (TE) under terminal WS conditions”
The same questions in other papers
transgenic · yield · Cicer arietinum (chickpea)Positive and negative results
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