Water relations, gas exchange and abscisic acid content of<i>Lupinus cosentinii</i>leaves in response to drying different proportions of the root system

Gallardo, M.; Turner, Neil C.; Ludwig, C. A.

doi:10.1093/jxb/45.7.909

Cited by 86 publications

(66 citation statements)

References 33 publications

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“…The inverse relationship between WUE and transpiration rate in Fig. 3a is supported by the findings of Gallardo et al (1994) and McVetty et al (1989), who noted that the decreased stomatal conductance or transpiration rate was the primary cause of the greater WUE during water stress conditions. Similarly, Bradbury & Malcolm (1977) reported that P-deficient Sitka spruce seedlings had greater transpiration rates and a lower WUE than P-adequate seedlings.…”

Section: Increased Leaf Phosphorus Concentration Decreased Transpiratsupporting

confidence: 73%

“…The closure of stomata mainly occurs in response to root signals in the form of increased ABA production, which is then transported to the leaves (Gallardo et al, 1994 ;Schroeder & Hagiwara, 1998). The rapid synthesis of ABA in roots under soil water deficit stress, with resultant increases in the ABA of xylem sap flowing towards still turgid leaves was reviewed by Davies & Zhang (1991).…”

Section: mentioning

confidence: 99%

“…The rapid synthesis of ABA in roots under soil water deficit stress, with resultant increases in the ABA of xylem sap flowing towards still turgid leaves was reviewed by Davies & Zhang (1991). Although these findings strongly support the fact that stomatal control of transpirational loss of water is due to increased concentrations of leaf tissue or xylem ABA, there is recent evidence indicating the in-volvement of other compounds or mechanisms (Munns & King, 1988 ;Cellier et al, 1998) The drought tolerance and water-use efficiency of many species has been reported to improve with enhanced P nutrition (McVetty et al, 1989 ;Gallardo et al, 1994). However, it is not clear what interactive effects of ABA and P concentrations in leaves may have on the stomatal control of transpiration under dry conditions.…”

Section: mentioning

confidence: 99%

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Phosphorus concentrations in the leaves of defoliated white clover affect abscisic acid formation and transpiration in drying soil

et al. 2000

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Increased leaf phosphorus (P) concentration improved the water-use efficiency (WUE) and drought tolerance of regularly defoliated white clover plants by decreasing the rate of daily transpiration per unit leaf area in dry soil. Night transpiration was around 17% of the total daily transpiration. The improved control of transpiration in the high-P plants was associated with an increased individual leaf area and WUE that apparently resulted from net photosynthetic assimilation rate being reduced less than the reductions in the transpiration (27% vs 58%). On the other hand, greater transpiration from low-P plants was associated with poor stomatal control of transpirational loss of water, less ABA in the leaves when exposed to dry soil, and thicker and smaller leaf size compared with high-P leaves. The leaf P concentration was positively related with leaf ABA, and negatively with transpiration rates, under dry conditions (P 0n001). However, leaf ABA was not closely related to the transpiration rate, suggesting that leaf P concentration has a greater influence than ABA on the transpiration rates.

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Section: Increased Leaf Phosphorus Concentration Decreased Transpiratsupporting

confidence: 73%

Section: mentioning

confidence: 99%

Section: mentioning

confidence: 99%

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Phosphorus concentrations in the leaves of defoliated white clover affect abscisic acid formation and transpiration in drying soil

et al. 2000

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“…Differences in stomatal conductance of chickpea leaf in response to water potential have been reported (Lawn, 1982;Muchow, 1985). Abscisic acid (ABA) has been shown to have an important role in stomatal conductance in lupin (Gallardo et al, 1994). Nayyar et al (2005) found higher ABA contents in the wild Cicer species Cicer reticulatum than in the cultivated species under water stress.…”

Section: ) D E H Y D R a T I O N P O S T P O N E M E N T ( D Ro U G Hmentioning

confidence: 99%

Improving Drought-Avoidance Root Traits in Chickpea (Cicer arietinumL.) -Current Status of Research at ICRISAT

Gaur

Krishnamurthy

Kashiwagi

2008

Plant Production Science

149

139

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“…Herbaceous plants are also likely to evolve their root systems into subsoil layers (e.g. Garwood and Williams 1967;Gallardo et al 1994;Huang et al 1997;Grieu et al 2001). So far, however, only a few analyses of soil moisture dynamics have taken into account the shift of plant-rooting depth in relation to the progress of drying in a topsoil (e.g.…”

Section: Introductionmentioning

confidence: 99%

Subsoil water available in suction and poor in amount under continuous grassland use

Iiyama

Hirai

2014

Soil Science and Plant Nutrition

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Soil water storage in grassland is critical to regulate herbage yield while it may be threatened by continuous land use without plowing because of the progress of soil compaction associated with worsening soil hydraulic properties. This study aimed at contrasting the quantity and the availability of soil water in a meadow which had not been renovated for 13 years. We monitored matric potentials and mass soil water contents to 100 cm depth from autumn to winter in which plant transpiration was dormant. Soil water capacities were determined with soil water characteristics. The measurements were made in both a harvesting area in which agricultural vehicles had been operated, and a tree cover area which had experienced almost no vehicle loads. The soil layer in the tree cover area had a larger capacity for readily available moisture than that in the harvesting area. The matric potentials in the tree cover area varied in time between 0 and -1000 cm regardless of depth while those in the harvesting area were rather steady. These suggested better pore water continuity in the tree cover area. In the subsoil layers in both the harvesting and the tree cover areas, the soil water contents in terms of actually stored water did not reach as high a level as those expected from the soil moisture characteristics of the matric potential of -1000 cm. On the other hand, the measured matric potentials were consistently readily available for plants during the entire period of measurement. The apparent discrepancy between the matric potentials in readily available vs. actually stored water implied that the subsoil layers had become drier than observed during the study period, and that soil water hysteresis had prevented the full recovery of the water storage.

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Water relations, gas exchange and abscisic acid content ofLupinus cosentiniileaves in response to drying different proportions of the root system

Cited by 86 publications

References 33 publications

Phosphorus concentrations in the leaves of defoliated white clover affect abscisic acid formation and transpiration in drying soil

Phosphorus concentrations in the leaves of defoliated white clover affect abscisic acid formation and transpiration in drying soil

Improving Drought-Avoidance Root Traits in Chickpea (Cicer arietinumL.) -Current Status of Research at ICRISAT

Subsoil water available in suction and poor in amount under continuous grassland use

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