Growth and Morphogenesis of Sun and Shade Plants Iii. The Combined Effects of Light Intensity and Nutrient Supply

Corré, W.J.

doi:10.1111/j.1438-8677.1983.tb01713.x

Cited by 44 publications

(22 citation statements)

References 28 publications

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“…In previous studies, similar results were found in that RGR differences were ascribed only to NAR (Eagles, 1967;Pons, 1977), only to LAR (Higgs and James, 1969;Dijkstra, 1989;Smeets and Garretsen, 1986), or to both NAR and LAR together (Jarvis and Jarvis, 1964;Corrẽ, 1983). In particular, differences in light intensity between the two environments likely influenced the relative contributions of NAR and SLA to RGR.…”

Section: Discussionsupporting

confidence: 81%

Morphological Traits Underlying Differences in Early Vigor among Four Cotton Genotypes

et al. 2019

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In comparison with other annual crops, cotton (Gossypium hirsutum L.) seedlings develop slowly after emergence. More rapid seedling development can provide advantages in limiting disease, insect, and weed impacts on cotton seedlings. Information on the mechanisms determining early vigor in cotton is limited. Therefore, three genotypes previously identified to differ in seedling vigor and one commercial cultivar were selected for detailed characterization of early growth in greenhouse and field conditions. Growing environment and genotype effects were significant for many of the measured traits. Environmental conditions prevailing in field and greenhouse conditions differentially affected seedling growth, including cotyledon biomass, root weight ratio (RWR), net assimilation rate (NAR), and specific leaf area (SLA). Genotypic differences were found in one or both environments for cotyledon area, area of the first leaf, total leaf area, and leaf, stem, root, and total biomass. Leaf weight ratio (LWR), stem weight ratio (SWR), RWR, LAR, and SLA differed among genotypes at most stages, but this was not the case for relative growth rate and NAR. The high‐vigor genotype generally had longer roots, larger cotyledons, greater cotyledon, stem, and total biomass, and greater SWR and RWR than the low‐vigor genotype. The low‐vigor genotype had the greatest LAR, SLA, and LWR among the four genotypes. Results obtained in this study suggest that factors such as the efficiency of photoassimilate conversion into biomass, energy density of the biomass, root carbon exudation, and/or photosynthetic rates differ between the low‐vigor and high‐vigor genotypes.

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Section: Discussionsupporting

confidence: 81%

Morphological Traits Underlying Differences in Early Vigor among Four Cotton Genotypes

et al. 2019

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“…It is well-known that the functional equilibrium between shoot and root (Brouwer, 1963) may be expressed in the respective masses and specific activities of above-and under-ground parts of the plant (Corr6, 1983). Reproductive plants of P.lanceolata are assumed to have a reduced overall photosynthetic activity.…”

Section: Discussionmentioning

confidence: 99%

Utilization of the ambient concentration as a criterion for steady state after exponential growth: Some culture experiments with optimum or suboptimum N nutrition

Freijsen

Otten

1993

Plant Soil

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Culture experiments are described in which Plantago lanceolata L. was grown from seedling till flowering under steady state conditions of optimum or suboptimum nitrate nutrition. In the optimum treatment, plants had free access to nitrate. In two suboptimum treatments, nitrate was added with constant relative addition rates (RAR) of 0.18 or 0.10 d-1 during the phase of constant relative uptake rates (RUR) of the plants and then with RAR's that were reduced stepwise from 0.18 to 0.07 d -1 or 0.10 to 0.04 d -1 when nutrient absorption gradually decreased. Reduction of the RAR's was aimed at maintenance of a balance between R A R and RUR. External nitrate concentrations were measured to monitor the reductions. In the vegetative phase, the relative growth rate (RGR) and the root weight ratio (RWR) of P. lanceolata were constant. In the reproductive phase, RGR's were constant, but lower, and RWR's decreased. Concentrations of organic-N in leaves were stable during the experimental period while those of the peduncles were lower and decreased with time. The ratio of reproductive to vegetative weight increased linearly with time. A number of plant parameters varied with N supply.

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“…However, these studies, analysing the data from differing perspectives, did not test whether the proportional impact of drought on RGR differed across irradiance treatments. Because dry mass yield is an exponential function of RGR (Evans 1972), a greater impact of drought on yield can arise at higher irradiance, even when resource-levels have independent, multiplicative effects on RGR (Corré 1983), especially when RGR is high, i.e. for fast-growing species.…”

Section: Orthogonal Impacts Of Shade and Droughtmentioning

confidence: 99%

The combined impacts of deep shade and drought on the growth and biomass allocation of shade-tolerant woody seedlings

2002

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To test whether the impact of drought on the growth and biomass allocation of first-season shade-tolerant woody seedlings in low irradiance differs from that in high irradiance, seedlings of Viburnum lantana, V. opulus, V. tinus and Hedera helix were grown in pots at two watering frequencies × three irradiances. Hypotheses in the recent literature variously predict that drought will have a stronger, weaker or equal impact on seedling relative growth rate (RGR) in deep shade relative to that in moderate shade. Experimental irradiance levels were selected in the typical range for temperate deciduous forest seedlings in either understorey or clearings: 3-4% daylight (low red: far-red shade), 3-4% daylight (neutral shade), and 30-40% daylight (neutral shade). Watering was 'frequent' (every 3-4 days) or 'infrequent' (five times during the 8-week experiment), producing soil matric potentials as low as -0.03 MPa, and -2 MPa. To prevent the interaction of irradiance and watering treatments, each seedling was grown in a 'shade tower' that was surrounded by an uncovered sward of grass (Festuca rubra), which depleted pot water at the same rate regardless of the species of seedling, or its irradiance treatment. Shading affected all species: seedlings in 3.5% daylight grew at 56-73% of their dry-mass RGR in 35% daylight. Low red: far-red shade reduced the RGR of Hedera to 68% of its value in neutral shade. Infrequent watering significantly reduced the RGR of only V. lantana and V. opulus, by approximately the same proportion across irradiance treatments. Infrequent watering did not significantly alter any species' biomass allocation across irradiance treatments. Such orthogonal impacts of deep shade and drought on seedling growth and biomass allocation indicate a large potential for niche differentiation at combinations of irradiance and water supply for species of forest seedlings, and suggest a multiplicative-effects approach for modelling seedling performance in microsites with different combinations of irradiance and water supply.

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Growth and Morphogenesis of Sun and Shade Plants Iii. The Combined Effects of Light Intensity and Nutrient Supply

Cited by 44 publications

References 28 publications

Morphological Traits Underlying Differences in Early Vigor among Four Cotton Genotypes

Morphological Traits Underlying Differences in Early Vigor among Four Cotton Genotypes

Utilization of the ambient concentration as a criterion for steady state after exponential growth: Some culture experiments with optimum or suboptimum N nutrition

The combined impacts of deep shade and drought on the growth and biomass allocation of shade-tolerant woody seedlings

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