Abstract
Rainfed mungbean crops in Queensland Australia frequently experience terminal drought (drought stress in the final stages of reproductive development), highlighting the importance of drought-tolerant varieties for sustainable mungbean production. Given there is limited information on the relative drought tolerance of current mungbean varieties in Australia, the study of genetic variations and mechanisms of drought tolerance in summer mungbean can provide a basis for developing drought-tolerant mungbean varieties. This study evaluated the physiological, biochemical, and phenological traits underpinning yield attributes associated with drought tolerance in selected mungbean varieties. Four new mungbean varieties (AVTMB#1 to 4) and the Australian commercial line (Jade-AU) were grown in tall (75 cm) polyvinyl chloride (PVC) lysimeters where drought stress was imposed at the early flowering stage (R1) and maintained until maturity. Drought stress significantly impacted all the varieties. Averaged across all the varieties, drought stress was associated with a reduction in stomatal conductance (gs) and photosynthetic rate (Asat) by 78% and 86%, respectively, compared to well-watered plants. Internal carbon dioxide concentration (Ci), the effective quantum yield of photosystem II (ΦPSII) and maximum light-use efficiency of light-acclimated photosystem II (PSII) centres (Fv’/Fm’) were also decreased, while excitation pressure (1-qP) increased with drought treatment. A positive correlation (r = 0.60) existed between seed yield and ΦPSII assessed at R1, while a weak correlation with Fv’/Fm’ (r = 0.24) was observed. Excitation pressure (1-qP) at the R1 stage was negatively correlated with seed yield (r = −0.66). Therefore, leaf fluorescence measures, viz., 1-qP and ΦPSII, were recommended for use in screening mungbean varieties for drought tolerance. The varieties, AVTMB#1 and AVTMB#4, respectively achieved 39 and 38% greater seed yields relative to the commercial variety, Jade-AU, under terminal drought conditions.
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Claims 14
Claim · model-written summary
Terminal drought significantly affected all varieties.
- Taxon
- mungbean
.jpg?width=60)
Vigna radiatat0 - Treatment
- Drought stresse0
- Outcome
- all the varietiese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Drought stress significantly impacted all the varieties.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Drought reduced stomatal conductance by 78% compared with well watered plants.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- drought stresse0
- Outcome
- stomatal conductance (gs)e0
- Direction
- reductione0
- Value
- 78%e0
- Comparator
- well-watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress was associated with a reduction in stomatal conductance (gs) and photosynthetic rate (Asat) by 78% and 86%, respectively, compared to well-watered plants.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Drought reduced photosynthetic rate by 86% compared with well watered plants.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- drought stresse0
- Outcome
- photosynthetic rate (Asat)e0
- Direction
- reductione0
- Value
- 86%e0
- Comparator
- well-watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress was associated with a reduction in stomatal conductance (gs) and photosynthetic rate (Asat) by 78% and 86%, respectively, compared to well-watered plants.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Drought decreased internal carbon dioxide concentration.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- drought treatmente0
- Outcome
- Internal carbon dioxide concentration (Ci)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Internal carbon dioxide concentration (Ci), the effective quantum yield of photosystem II (ΦPSII) and maximum light-use efficiency of light-acclimated photosystem II (PSII) centres (Fv’/Fm’) were also decreased, while excitation pressure (1-qP) increased with drought treatment.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Drought decreased effective quantum yield of photosystem II.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- drought treatmente0
- Outcome
- effective quantum yield of photosystem II (ΦPSII)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Internal carbon dioxide concentration (Ci), the effective quantum yield of photosystem II (ΦPSII) and maximum light-use efficiency of light-acclimated photosystem II (PSII) centres (Fv’/Fm’) were also decreased, while excitation pressure (1-qP) increased with drought treatment.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Drought decreased maximum light use efficiency of PSII.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- drought treatmente0
- Outcome
- maximum light-use efficiency of light-acclimated photosystem II (PSII) centres (Fv’/Fm’)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Internal carbon dioxide concentration (Ci), the effective quantum yield of photosystem II (ΦPSII) and maximum light-use efficiency of light-acclimated photosystem II (PSII) centres (Fv’/Fm’) were also decreased, while excitation pressure (1-qP) increased with drought treatment.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Drought increased excitation pressure.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- drought treatmente0
- Outcome
- excitation pressure (1-qP)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“excitation pressure (1-qP) increased with drought treatment.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Seed yield correlated positively with ΦPSII at R1, with r = 0.60.
- Taxon
- mungbeanVigna radiatat0
- Organ / stage
- R1e0
- Outcome
- seed yielde0
- Direction
- positivee0
- Value
- r = 0.60e0
- Comparator
- ΦPSIIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A positive correlation (r = 0.60) existed between seed yield and ΦPSII assessed at R1”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Seed yield had a weak correlation with Fv’/Fm’ at R1, r = 0.24.
- Taxon
- mungbeanVigna radiatat0
- Outcome
- correlation with Fv’/Fm’e0
- Direction
- weake0
- Value
- r = 0.24e0
- Comparator
- Fv’/Fm’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a weak correlation with Fv’/Fm’ (r = 0.24) was observed.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
Excitation pressure at R1 correlated negatively with seed yield, r = −0.66.
- Taxon
- mungbeanVigna radiatat0
- Organ / stage
- R1 stagee0
- Outcome
- seed yielde0
- Direction
- negativelye0
- Value
- r = −0.66e0
- Comparator
- Excitation pressure (1-qP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excitation pressure (1-qP) at the R1 stage was negatively correlated with seed yield (r = −0.66).”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
The authors recommend 1-qP for screening drought tolerance.
- Taxon
- mungbeanVigna radiatae0
- Outcome
- 1-qPe0
- Qualifier
- screening mungbean varieties for drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf fluorescence measures, viz., 1-qP and ΦPSII, were recommended for use in screening mungbean varieties for drought tolerance.”
Claim · model-written summary
The authors recommend ΦPSII for screening drought tolerance.
- Taxon
- mungbeanVigna radiatae0
- Outcome
- ΦPSIIe0
- Qualifier
- screening mungbean varieties for drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf fluorescence measures, viz., 1-qP and ΦPSII, were recommended for use in screening mungbean varieties for drought tolerance.”
Claim · model-written summary
AVTMB#1 had 39% greater seed yield than Jade-AU under terminal drought.
- Taxon
- mungbeanVigna radiatat0
- Material
- AVTMB#1e0
- Outcome
- seed yieldse0
- Direction
- greatere0
- Value
- 39e0
- Qualifier
- under terminal drought conditionse0
- Comparator
- Jade-AUe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The varieties, AVTMB#1 and AVTMB#4, respectively achieved 39 and 38% greater seed yields relative to the commercial variety, Jade-AU, under terminal drought conditions.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
Claim · model-written summary
AVTMB#4 had 38% greater seed yield than Jade-AU under terminal drought.
- Taxon
- mungbeanVigna radiatat0
- Material
- AVTMB#4e0
- Outcome
- seed yieldse0
- Direction
- greatere0
- Value
- 38%e0
- Qualifier
- under terminal drought conditionse0
- Comparator
- Jade-AUe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The varieties, AVTMB#1 and AVTMB#4, respectively achieved 39 and 38% greater seed yields relative to the commercial variety, Jade-AU, under terminal drought conditions.”
t0“Screening New Mungbean Varieties for Terminal Drought Tolerance”
The same questions in other papers
drought · physiology: photosynthesis · Vigna radiata (mung bean)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
7 papers more in this group
See all 11 papers →drought · physiology: gas exchange · Vigna radiata (mung bean)Results agree
2 papers in the same direction as this paper
- 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.