Abstract
Abstract Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used to investigate the influence of soil drying on the abscisic acid ( ABA ) accumulation in leaves, stomatal conductance ( g s ), leaf water relations, osmotic adjustment ( OA ), leaf desiccation tolerance, yield and yield components. The greater ABA accumulation was induced by soil drying, which also inducing g s decreased at higher soil water contents ( SWC ) and leaf relative water content ( RWC ) significantly decreased at lower SWC in the new soya bean cultivars than in the old soya bean cultivars. The soil water threshold between the value at which stomata began to close and the RWC began to decrease was significantly broader in the new cultivars than in the old cultivars. The new cultivars had significantly higher OA and lower lethal leaf water potential than old cultivars when the soil dried. The old cultivars had greater biomass, but lower grain yield than the new cultivars in well‐watered, moderate stress and severe stress conditions. Thus with soil drying, the new soya bean cultivars demonstrated greater adaptation to drought by inducing greater ABA accumulation, stomatal closure at higher SWC, enhanced OA and better water relations, associated with increased leaf desiccation tolerance, greater water use efficiency and higher yield.
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Claims 11
Claim · model-written summary
Soil drying induced greater ABA accumulation in soya bean leaves.
Not reportedComparator
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e0“The greater ABA accumulation was induced by soil drying”
Claim · model-written summary
Soil drying decreased stomatal conductance at higher soil water contents.
- Taxon
- soya beane7
- Treatment
- soil dryinge0
- Outcome
- g se1
- Direction
- decreasede1
- Qualifier
- at higher soil water contentse1
Not reportedComparator
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e0“The greater ABA accumulation was induced by soil drying”
e1“which also inducing g s decreased at higher soil water contents ( SWC )”
Claim · model-written summary
Leaf relative water content of new soya bean cultivars decreased significantly at lower soil water content compared with old cultivars.
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e0“The greater ABA accumulation was induced by soil drying”
e2“leaf relative water content ( RWC ) significantly decreased at lower SWC in the new soya bean cultivars than in the old soya bean cultivars”
Claim · model-written summary
The soil water threshold between stomatal closure and decline in relative water content was significantly broader in new cultivars than in old cultivars.
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e0“The greater ABA accumulation was induced by soil drying”
e3“The soil water threshold between the value at which stomata began to close and the RWC began to decrease was significantly broader in the new cultivars than in the old cultivars”
Claim · model-written summary
New soya bean cultivars had significantly higher osmotic adjustment than old cultivars when the soil dried.
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e4“The new cultivars had significantly higher OA and lower lethal leaf water potential than old cultivars when the soil dried”
Claim · model-written summary
New soya bean cultivars had significantly lower lethal leaf water potential than old cultivars when the soil dried.
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e4“The new cultivars had significantly higher OA and lower lethal leaf water potential than old cultivars when the soil dried”
Claim · model-written summary
Old soya bean cultivars had greater biomass than new cultivars under well-watered, moderate and severe stress conditions.
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e5“The old cultivars had greater biomass, but lower grain yield than the new cultivars in well‐watered, moderate stress and severe stress conditions”
Claim · model-written summary
Old soya bean cultivars had lower grain yield than new cultivars under well-watered, moderate and severe stress conditions.
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e5“The old cultivars had greater biomass, but lower grain yield than the new cultivars in well‐watered, moderate stress and severe stress conditions”
Claim · model-written summary
New soya bean cultivars showed increased leaf desiccation tolerance under soil drying.
- Taxon
- soya beane7
- Material
- new soya bean cultivarse6
- Treatment
- soil dryinge6
- Outcome
- leaf desiccation tolerancee6
- Direction
- increasede6
Not reportedComparator
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e6“Thus with soil drying, the new soya bean cultivars demonstrated greater adaptation to drought by inducing greater ABA accumulation, stomatal closure at higher SWC, enhanced OA and better water relations, associated with increased leaf desiccation tolerance, greater water use efficiency and higher yield”
Claim · model-written summary
New soya bean cultivars had greater water use efficiency under soil drying.
- Taxon
- soya beane7
- Material
- new soya bean cultivarse6
- Treatment
- soil dryinge6
- Outcome
- water use efficiencye6
- Direction
- greatere6
Not reportedComparator
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e6“Thus with soil drying, the new soya bean cultivars demonstrated greater adaptation to drought by inducing greater ABA accumulation, stomatal closure at higher SWC, enhanced OA and better water relations, associated with increased leaf desiccation tolerance, greater water use efficiency and higher yield”
Claim · model-written summary
New soya bean cultivars gave higher yield under soil drying.
- Taxon
- soya beane7
- Material
- new soya bean cultivarse6
- Treatment
- soil dryinge6
- Outcome
- yielde6
- Direction
- highere6
Not reportedComparator
Verbatim
e7“Two old (Huangsedadou and Longxixiaohuangpi ( LX )) and two new (Jindou 19 ( JD ) and Zhonghuang 30 ( ZH )) soya bean ( G lycine max (L.) Merr.) cultivars were used”
e6“Thus with soil drying, the new soya bean cultivars demonstrated greater adaptation to drought by inducing greater ABA accumulation, stomatal closure at higher SWC, enhanced OA and better water relations, associated with increased leaf desiccation tolerance, greater water use efficiency and higher yield”