Leaf morphology and water status changes in <i>Triticum durum</i> under water stress

Rascio, Agata; Cedola, M. C.; Toponi, M. A.; Flagella, Zina; Wittmer, G.

doi:10.1111/j.1399-3054.1990.tb09064.x

Cited by 40 publications

(25 citation statements)

References 20 publications

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“…1986a(Ai-aus et at. , 1989Rascio et al 1990). In this case the cor-relation between LDM and A would probably indicate an association rather than a causal link.…”

Section: Introductionmentioning

confidence: 93%

Effect of leaf structure and water status on carbon isotope discrimination in field‐grown durum wheat

Araus

Amaro

Zuhair

et al. 1997

Plant Cell & Environment

105

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The relationships between leaf and kernel carbon isotope discriminations (A) and several leaf structural parameters that are indicators of photosynthetie eapacity were studied in durum wheat grown in the field under three water regimens. A set of 144 genotypes were cultivated in two rain-fed trials, and 125 of these were grown under supplementary irrigation before heading. Total chlorophyll and nitrogen (N) contents, the dry mass per unit leaf area (LDM, the reciprocal of specific leaf area) and carbon isotope discrimination (zl) were measured in penultimate leaves and A of mature kernels was also analysed. Both LDM and N per unit area showed significant (P < 0-001) negative correlation (r = -0-60 and r = -0-36, respectively) with leaf A in the wettest trial. Little or no correlation was found lor any structural parameter and leaf A in the rain-fed trials. In contrast, in the two rain-fed trials LDM was the parameter with the strongest positive correlation (P < 0-001) witb kernel A (r = 0-47 and 0-30) and grain yield (r = 0-43 and 0-29), whereas no correlation was found in the irrigation trial. These correlations, rather than representing a cau,sal link between tbe amount of pbotosyntbetic tissue and A, were probably indirect associations caused by a parallel effect of water status and phenology on leaf structure, grain A and yield. Correlations across trials (i.e. environments) between leaf structure and eitber A and yield were very bigb, altbough also spurious. Our results suggest tbat LDM sbould be used to cull segregating population differences in leaf A based on tbe internal pbotosynthetic capacity only in the absence of drought. Selecting for kernel A and grain yield on the basis of LDM is worthwhile for rain-fed trials.

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“…1986a(Ai-aus et at. , 1989Rascio et al 1990). In this case the cor-relation between LDM and A would probably indicate an association rather than a causal link.…”

Section: Introductionmentioning

confidence: 93%

Effect of leaf structure and water status on carbon isotope discrimination in field‐grown durum wheat

Araus

Amaro

Zuhair

et al. 1997

Plant Cell & Environment

105

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“…Myers et al, 1987) is responsible for changing chemical composition of leaf cell walls . Acclimation to long-term differences in availability of water includes increases in cell-wall lignin content and the proportion of supporting structures in the foliage (Myers et al, 1987 ;Rascio et al, 1990 ;Fredeen et al, 1991).…”

Section: Variability Of Glucose Requirement For Formation Of a Unit Fmentioning

confidence: 99%

Energy requirement for foliage formation is not constant along canopy light gradients in temperate deciduous trees

Niinemets

1999

New Phytologist

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Foliage construction cost (glucose requirement for formation of a unit foliar biomass, G, kg glu kg −" ), chemical composition and morphology were examined along a light gradient across the canopies in five deciduous species, which ranked according to increasing shade-tolerance as Populus tremula Fraxinus excelsior Tilia cordata l Corylus avellana Fagus sylvatica. Light conditions in the canopy were estimated by a hemispheric photographic technique, allowing ranking of sample locations according to long-term light input incident to the sampled leaves (relative irradiance). G and foliage carbon concentration increased with increasing relative irradiance in F. excelsior, T. cordata and C. avellana, but were independent of irradiance in F. sylvatica and P. tremula. However, if G of non-structural-carbohydrate-free dry mass was considered, it also increased with increasing relative irradiance in P. tremula. A positive correlation between the concentration of carbon-rich lignin and irradiance, probably a result of the acclimation to greater water stress at higher light, was the major reason for the lightdependence of G. Lignin concentrations were highest in more shade-tolerant species, resulting in greatest carbon concentrations in these species. Since carbon concentration and G are directly linked, the leaves of shade-tolerant species were also more expensive to construct. As the result of these effects, G increased faster with increasing leaf dry mass per area which was mainly determined by relative irradiance, in shade-tolerators. Given that shadetolerant species had lower leaf dry mass per area at common irradiance and that this saturated at lower relative irradiance than leaf dry mass per area in the intolerant species, it was concluded that enhanced energy requirements for foliage construction might constrain species morphological plasticity and the upper limit of leaf dry mass per area attainable at high light.

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“…However, water stress has a special place because of its frequency, and the place that water plays in metabolic processes (Turner, 1990;Bálo et al, 1995). Due to its role in photosynthesis, transport and accumulation, as well as multiplication and cell enlargement, water has a critical role in the growth and development of plants (Rascio et al, 1990;Blake et al, 1991;Medrano et al, 1992;Cabeza et al, 1995). Damage caused by water stress results from drying protoplasmic; the departure of water causes an increase in the concentration of solutes.…”

Section: Introductionmentioning

confidence: 99%

The physiological and behavioural responses of argan seedlings (Argania spinosa (L.) Skeels) to water stress in the semi-arid Western Algeria

Zohra¹,

Movafeghi²,

Moulay³

2014

Int. J. Plant Physiol. Biochem.

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This paper presents the behavior, morpho-physiological and biochemical responses of argan seedlings to three water regimes at 30, 60 and 100% of field capacity. Based on the results of the growth parameters, we use the best result obtained from height growth. The increase in the number of leaves and thorns is obtained in seedlings subjected to water stress levels of about 60 and 100% against the application of a severe water stress of 30 and 0%. This led to reduction in the height of the stem, the number of leaves, and radial growth of biomass, and increased the length of the root portion. Regarding the water parameters, we noted a gradual decline in the relative water, the fresh and dry weight of leaves, stems and roots contents, with minimum values in the most severe stress (30 and 0%). Regarding the biochemical parameters, a decline in the relative water content is followed by a significant accumulation of soluble sugars and protein. Regarding the physiological parameters, stomata density intensifies level maintained at low water contents where the number of stomata per unit area behaves greatly compared to that of the hydrated treatments. Sweating is greatly reduced by increased water deficit; it is even more pronounced in the most severe treatment (30 and 0%).

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Leaf morphology and water status changes in Triticum durum under water stress

Cited by 40 publications

References 20 publications

Effect of leaf structure and water status on carbon isotope discrimination in field‐grown durum wheat

Effect of leaf structure and water status on carbon isotope discrimination in field‐grown durum wheat

Energy requirement for foliage formation is not constant along canopy light gradients in temperate deciduous trees

The physiological and behavioural responses of argan seedlings (Argania spinosa (L.) Skeels) to water stress in the semi-arid Western Algeria

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