Yellow lupin (Lupinus luteus) tolerates waterlogging better than narrow-leafed lupin (L. angustifolius) I. Shoot and root growth in a controlled environment

Davies, C.L.; Turner, D. W.; Dracup, M.

doi:10.1071/ar99073

Cited by 33 publications

(24 citation statements)

References 24 publications

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“…The differences in flooding tolerance, in terms of shoot biomass, can also become evident during the post-flooding period, as was demonstrated for two legumes of Lupinus species on individual plants (Davies et al, 2000a) and in field conditions (Davies et al, 2000b). In our study and in one previous report (Vignolio et al, 1994), the total above-ground biomass was affected in the less tolerant L. corniculatus but was not affected in the more tolerant L. glaber within the flooding period.…”

Section: Discussionsupporting

confidence: 58%

Physiological and Anatomical Basis of Differential Tolerance to Soil Flooding of Lotus corniculatus L. and Lotus glaber Mill

et al. 2005

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Lotus corniculatus L. and Lotus glaber Mill. are warm-season legume species adapted to many kinds of environmental stress, including flooding conditions, whereas other popular forage legumes, like alfalfa or white clover, cannot thrive. This study evaluates the relationship between root aerenchyma, water relations and leaf gas exchange and the differential tolerance to soil flooding of L. corniculatus and L. glaber. Adult plants of these species, established independently in grasslands mesocosms, were subjected to 40 days of early spring flooding at a water depth of 6 cm. Both species presented constitutive aerenchyma tissue in the roots. Under flooding conditions, this parameter was 26.2% in L. glaber and 15.3% in L. corniculatus. In addition, flooded plants of L. glaber presented a leaf biomass 47.5% higher above water while L. corniculatus showed a leaf biomass 59.6% lower in the same layer, in comparison to control plants. Flooded plants of L. glaber maintained the stomatal conductance (g s ) and transpiration rate (E) for 25 days, although these parameters reduce slightly to 40À60% in comparison to controls after 40 days of flooding. In this species, a reduction in photosynthesis (A) in flooding conditions was detected only on the last day of measurement. In L. corniculatus, the same parameters (g s , E and A) were affected by flooding since day 18 of treatment, and values reached 25À40% in comparison to control plants after 40 days of flooding. Flooding did not affect above-ground biomass in L. glaber; while in L. corniculatus, above-ground biomass was 35% lower than in control plants. Our results confirmed that L. glaber is more able to cope with flooding stress than L. corniculatus, even in the presence of natural competitors. On the whole, this experiment provides information that can aid in the identification of anatomical and physiological parameters associated with flood-tolerance in this forage legume species, with economic potential for the agricultural areas subject to periodic flooding.

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Section: Discussionsupporting

confidence: 58%

Physiological and Anatomical Basis of Differential Tolerance to Soil Flooding of Lotus corniculatus L. and Lotus glaber Mill

et al. 2005

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“…The more severely waterlogged plants were only able to partially recover after 14 d of free drainage. Adaptation to waterlogging in lupins was studied by (Davies et al, 2000b), who found that growth response to hypoxia was more pronounced two weeks after waterlogging ceased than directly at the end of waterlogging. This result is confirmed in our study, where relative biomass production in stressed lucerne compared to controls (initial biomass before waterlogging commenced was not measured) was more reduced at the time of recovery than at the end of hypoxia (Figure 3).…”

Section: Discussionmentioning

confidence: 99%

Nutritional and chlorophyll fluorescence responses of lucerne (Medicago sativa) to waterlogging and subsequent recovery

2005

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Periodic flooding of perennial crops such as lucerne (Medicago sativa, L) is a major cause of lowered productivity and leads in extreme cases to plant death. In this study, effects of waterlogging and subsequent recovery on plant nutrient composition and PSII photochemistry were studied to gain a better understanding of the mechanisms of recovery as they relate to leaf photochemistry (chlorophyll fluorescence) and nutrient dynamics. Three lucerne cultivars and one breeding line were flooded for 20 d, drained and left to recover for another 16 d under glasshouse conditions. Leaf and root nutrient composition (P, K, Ca, Mg, B, Cu and Zn) of waterlogged lucerne was significantly lower than in freely drained controls, leaf N concentrations were also significantly lower in waterlogged lucerne. At the same time, there were significantly (5-fold) higher concentrations of Fe in waterlogged roots and Na in leaves (2-fold) of stressed plants. PS II photochemistry, which was impaired due to waterlogging, recovered almost fully after 16 d of free drainage in all genotypes. Alongside fluorescence recovery, concentrations of several nutrients also increased in recovered plants. Growth parameters, however, remained suppressed after draining. The latter was due to both the smaller capacity of CO 2 assimilation in previously waterlogged plants (caused in part by nutrient deficiency and associated inhibition of PSII) and the plant's need to re-direct available nutrient and assimilate pools to repair the damage to the photosynthetic apparatus and roots. It is concluded, that for any lucerne-breeding program it is important to determine not only the degree of tolerance to waterlogging but also the potential for recovery of different genotypes, as well as look for 'outstanding individuals' within each population.Abbreviations: Ci -substomatal cavity CO 2 concentration; ETR -electron transport rate; Fo -minimal fluorescence; Fm -maximal fluorescence; Fv -variable fluorescence; NPQ -non-photochemical quenching; qP -photochemical quenching; qN -non-photochemical quenching; PAM -pulse amplitude modulation; WLwaterlogging; SDW shoot dry weight; RDW -root dry weight.

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“…Lupin seeds were inoculated with Bradyrhizobium (Nitrogerm 100; Adelaide Seed Company, Adelaide, Australia) at the time of planting. Plants in sand were watered daily with nutrient solution described by Davies, Turner & Dracup (2000) and were flushed once a week with deionized water. Maize seedlings were grown in aerated nutrient solution as described by Freundl, Steudle & Hartung (1998).…”

Section: Methodsmentioning

confidence: 99%

Comparison between gradient‐dependent hydraulic conductivities of roots using the root pressure probe: the role of pressure propagations and implications for the relative roles of parallel radial pathways

Bramley

Turner²,

Turner³

et al. 2007

Plant Cell & Environment

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Hydrostatic pressure relaxations with the root pressure probe are commonly used for measuring the hydraulic conductivity (Lpr) of roots. We compared the Lpr of roots from species with different root hydraulic properties (Lupinus angustifolius L. 'Merrit', Lupinus luteus L. 'Wodjil', Triticum aestivum L. 'Kulin' and Zea mays L. 'Pacific DK 477') using pressure relaxations, a pressure clamp and osmotic gradients to induce water flow across the root. Only the pressure clamp measures water flow under steady-state conditions. Lpr determined by pressure relaxations was twoto threefold greater than Lpr from pressure clamps and was independent of the direction of water flow. Lpr (pressure clamp) was two-to fourfold higher than for Lpr (osmotic) for all species except Triticum aestivum where Lpr (pressure clamp) and Lpr (osmotic) were not significantly different. A novel technique was developed to measure the propagation of pressure through roots to investigate the cause of the differences in Lpr. Root segments were connected between two pressure probes so that when root pressure (Pr) was manipulated by one probe, the other probe recorded changes in Pr. Pressure relaxations did not induce the expected kinetics in pressure in the probe at the other end of the root when axial hydraulic conductance, and probe and root capacitances were accounted for. An electric circuit model of the root was constructed that included an additional capacitance in the root loaded by a series of resistances. This accounted for the double exponential kinetics for intact roots in pressure relaxation experiments as well as the reduced response observed with the double probe experiments. Although there were potential errors with all the techniques, we considered that the measurement of Lpr using the pressure clamp was the most unambiguous for small pressure changes, and provided that sufficient time was allowed for pressure propagation through the root. The differences in Lpr from different methods of measurement have implications for the models describing water transport through roots and the potential role of aquaporins.

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Yellow lupin (Lupinus luteus) tolerates waterlogging better than narrow-leafed lupin (L. angustifolius) I. Shoot and root growth in a controlled environment

Cited by 33 publications

References 24 publications

Physiological and Anatomical Basis of Differential Tolerance to Soil Flooding of Lotus corniculatus L. and Lotus glaber Mill

Physiological and Anatomical Basis of Differential Tolerance to Soil Flooding of Lotus corniculatus L. and Lotus glaber Mill

Nutritional and chlorophyll fluorescence responses of lucerne (Medicago sativa) to waterlogging and subsequent recovery

Comparison between gradient‐dependent hydraulic conductivities of roots using the root pressure probe: the role of pressure propagations and implications for the relative roles of parallel radial pathways

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