1948
DOI: 10.1111/j.1469-8137.1948.tb05099.x
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Studies in the Morphogenesis of Leaves

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Cited by 64 publications
(16 citation statements)
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“…The results indicate that an unknown factor(s) underlying heteroblasty has an important role in the regulation of the cell number and cell size of leaves. Although an increase in cell number and a decrease in cell size in leaves at higher nodes have been observed in several species (Ashby, 1948;Granier and Tardieu, 1998;Cnops et al, 2004;Cookson et al, 2007), the cause of this phenomenon was unclear until the present study. In this report, we propose that miR156 and SPL genes are involved in heteroblastic change of cell number and size (see below).…”
Section: Discussionmentioning
confidence: 46%
See 1 more Smart Citation
“…The results indicate that an unknown factor(s) underlying heteroblasty has an important role in the regulation of the cell number and cell size of leaves. Although an increase in cell number and a decrease in cell size in leaves at higher nodes have been observed in several species (Ashby, 1948;Granier and Tardieu, 1998;Cnops et al, 2004;Cookson et al, 2007), the cause of this phenomenon was unclear until the present study. In this report, we propose that miR156 and SPL genes are involved in heteroblastic change of cell number and size (see below).…”
Section: Discussionmentioning
confidence: 46%
“…In Arabidopsis thaliana (Arabidopsis, hereafter), lamina size, leaf length/width ratio, petiole length, serration number, and production of abaxial trichomes change in relation to heteroblasty. Cell number and cell size in leaves might also change with heteroblasty, as an increase in cell number and a decrease in cell size in higher node leaves is observed in various species (Ashby, 1948;Granier and Tardieu, 1998;Cnops et al, 2004;Cookson et al, 2007). However, reduced water availability caused by water deprivation to leaves at lower nodes, or diffusive inhibitory signals from lower leaves were previously thought to account for the reduction in cell size in leaves on higher nodes (Ashby, 1948); whether this phenomenon is physiological or genetically controlled remains to be answered.…”
Section: Introductionmentioning
confidence: 99%
“…Both epidermal cell number and area vary in leaves depending on the rank of their emergence. A decline in cell area with increasing leaf position is commonly observed in plants, whereas epidermal cell number is generally increased as reported in Ipomoea (Ashby, 1948), sunflower (Helianthus annuus; Granier and Tardieu, 1998), and Arabidopsis (Cookson et al, 2007). Epidermal cell area distributions between different individual leaves have been discussed in terms of whole plant control mechanisms with a role for floral development (Ashby, 1948).…”
Section: Discussion Both Epidermal Cell Number and Cell Area Are Contmentioning
confidence: 99%
“…Regulation of individual leaf development seems even more complex because there is additional evidence that it is also controlled, to some extent, at the whole plant level. For example, the decline in cell area in leaves with increasing leaf position in a plant depends on whole plant control mechanisms related to floral transition as shown by floral bud removal or changes in daylength delaying or accelerating flowering (Ashby, 1948;Cookson et al, 2007).…”
mentioning
confidence: 99%
“…This could not be due to a genetic control of cell size, because final areas differed in leaves 8 and 16 analyzed here, but also in a series of similar analyses carried out in the field and in the greenhouse (C. Granier and F. Tardieu, unpublished data). Change in final cell area with position on the stem was also observed by Ashby (1948). Common final cell area was probably due to the fact that changes in RER and RDR were strictly parallel in all zones of a leaf, but the period with maintained RER and declining RDR was shorter in leaf 16 than in leaf 8.…”
Section: Discussionmentioning
confidence: 73%