Systemic irradiance signalling in tobacco

Thomas, Paul W.; Woodward, F. I.; Quick, W. Paul

doi:10.1046/j.1469-8137.2003.00954.x

Cited by 112 publications

(105 citation statements)

References 20 publications

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“…It is well known that stomatal morphogenesis is controlled by genetic as well as environmental factors and in general, an increase in light intensity results in an increase in stomatal index and a systemic signal from mature leaves determine the response. 43,[75][76][77][78] Light is perceived by various photoreceptors, 79,80 and stomatal movements are regulated by both blue and red light.…”

Section: Light Regulation Of Stomatal Movementmentioning

confidence: 99%

Control of stomatal aperture

Araújo

Fernie

Nunes‐Nesi

2011

Plant Signaling & Behavior

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Section: Light Regulation Of Stomatal Movementmentioning

confidence: 99%

Control of stomatal aperture

Araújo

Fernie

Nunes‐Nesi

2011

Plant Signaling & Behavior

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“…Larger top canopy leaves generally take advantage of the higher irradiance by exposing a larger surface to sun. In tobacco, leaves tended to be small under low irradiance; leaf size increased with irradiance until a certain level was reached [61].…”

Section: Relationships Between Leaf Morphology and Height In The Canopymentioning

confidence: 99%

Variability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxon

2007

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-Twelve poplar (Populus) genotypes, belonging to different taxa and to the sections Aigeiros and Tacamahaca, were studied during the third growing season of the second rotation of a high density coppice culture. With the objective to highlight the relationships between leaf traits, biomass production and taxon as well as the influence of canopy position, anatomical and morphological leaf characteristics (i.e. thickness of epidermis, of palisade and spongy parenchyma layers, density and length of stomata, leaf area, specific leaf area (SLA) and nitrogen concentration) were examined for mature leaves from all genotypes and at two canopy positions (upper and lower canopy). Above ground biomass production, anatomical traits, stomatal and morphological leaf characteristics varied significantly among genotypes and between canopy positions. The spongy parenchyma layer was thicker than the palisade parenchyma layer for all genotypes and irrespective of canopy position, except for genotypes belonging to the P. deltoides × P. nigra taxon (section Aigeiros). Leaves at the upper canopy position had higher stomatal density and thicker anatomical layers than leaves at the lower canopy position. Leaf area and nitrogen concentration increased from the bottom to the top of the canopy, while SLA decreased. Positive correlations between biomass production and abaxial stomatal density, as well as between biomass production and nitrogen concentration were found. A principal component analysis (PCA) showed that genotypes belonging to the same taxon had similar anatomical characteristics, and genotypes of the same section also showed common leaf characteristics. However, Wolterson (P. nigra) differed in anatomical leaf characteristics from other genotypes belonging to the same section (section Aigeiros). Hybrids between the two sections (Aigeiros × Tacamahaca) expressed leaf characteristics intermediate between both sections, while their biomass production was low.Populus spp. / taxon / stomatal density and length / thickness of leaf anatomical layers / nitrogen concentration / specific leaf area / productivity Résumé -Variabilité des caractères foliaires anatomiques et morphologiques du peuplier en relation avec la position des feuilles dans la canopée, la production de biomasse et le taxon. Douze génotypes de peuplier (Populus), appartenant à différents taxa ainsi qu'aux sections Aigeiros et Tacamahaca, ont été étudiés durant la troisième saison de croissance de la deuxième rotation d'une plantation à forte densité. L'objectif de l'expérience était de mettre en évidence les relations entre les caractères foliaires, la production de biomasse et le taxon, ainsi que l'influence de la position des feuilles dans la canopée. Pour ce faire, diverses caractéristiques anatomiques et morphologiques des feuilles (épaisseur des épidermes et des parenchymes palissadique et lacuneux, densité et longueur des stomates, surface foliaire, surface foliaire spécifique (SLA) et teneurs en azote) ont été déterminées pour des feuilles matures de ...

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“…Since then, some studies have reported that stomatal density, leaf thickness, and the development of stomatal and palisade tissue in newly developed leaves are independent of their local irradiance in Arabidopsis, poplar (Populus spp. ), and tobacco (Nicotiana tabacum), but instead depend on the light environment of mature leaves (Lake et al, 2001;Thomas et al, 2004;Coupe et al, 2006;Miyazawa et al, 2006). This longdistance signal from mature to developing leaves is defined as a systemic irradiance signal.…”

mentioning

confidence: 99%

Systemic Regulation of Leaf Anatomical Structure, Photosynthetic Performance, and High-Light Tolerance in Sorghum

et al. 2011

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Leaf anatomy of C3 plants is mainly regulated by a systemic irradiance signal. Since the anatomical features of C4 plants are different from that of C3 plants, we investigated whether the systemic irradiance signal regulates leaf anatomical structure and photosynthetic performance in sorghum (Sorghum bicolor), a C4 plant. Compared with growth under ambient conditions (A), no significant changes in anatomical structure were observed in newly developed leaves by shading young leaves alone (YS). Shading mature leaves (MS) or whole plants (S), on the other hand, caused shade-leaf anatomy in newly developed leaves. By contrast, chloroplast ultrastructure in developing leaves depended only on their local light conditions. Functionally, shading young leaves alone had little effect on their net photosynthetic capacity and stomatal conductance, but shading mature leaves or whole plants significantly decreased these two parameters in newly developed leaves. Specifically, the net photosynthetic rate in newly developed leaves exhibited a positive linear correlation with that of mature leaves, as did stomatal conductance. In MS and S treatments, newly developed leaves exhibited severe photoinhibition under high light. By contrast, newly developed leaves in A and YS treatments were more resistant to high light relative to those in MS-and S-treated seedlings. We suggest that (1) leaf anatomical structure, photosynthetic capacity, and high-light tolerance in newly developed sorghum leaves were regulated by a systemic irradiance signal from mature leaves; and (2) chloroplast ultrastructure only weakly influenced the development of photosynthetic capacity and high-light tolerance. The potential significance of the regulation by a systemic irradiance signal is discussed.

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Systemic irradiance signalling in tobacco

Cited by 112 publications

References 20 publications

Control of stomatal aperture

Control of stomatal aperture

Variability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxon

Systemic Regulation of Leaf Anatomical Structure, Photosynthetic Performance, and High-Light Tolerance in Sorghum

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