Vegetative Architecture ofElaeocarpus hookerianus.Transition from Juvenile to Adult

Day, Jamie S.; Gould, Kevin S.; Jameson, Paula E.

doi:10.1006/anbo.1996.0369

Cited by 40 publications

(18 citation statements)

References 16 publications

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“…However, patterns of heteroblastic variation are often more complex than this. For example, in Eucalyptus shoot development is typically divided into seedling, juvenile, transitional, and adult phases (Blake, 1953; Boland et al, 2006), and similar categories have been described in several species native to New Zealand (Day et al, 1997; Gould, 1993). Even in weakly heteroblastic species, such as Arabidopsis (Telfer et al, 1997) and maize (Bongard-Pierce et al, 1996), the first two leaves differ from other juvenile leaves in a variety of ways, and could easily be considered a distinct leaf type.…”

Section: Molecular Insights Into the Phenomenology Of Vegetative Pmentioning

confidence: 88%

Vegetative Phase Change and Shoot Maturation in Plants

Poethig

2013

Current Topics in Developmental Biology

250

217

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As a plant shoot develops, it produces different types of leaves, buds, and internodes, and eventually acquires the capacity to produce structures involved in sexual reproduction. Morphological and anatomical traits that change in coordinated fashion at a predictable time in vegetative development allow this process to be divided into several more-or-less discrete phases; the transition between these phases is termed vegetative phase change. Vegetative phase change is regulated by a decrease in the expression of the related microRNAs, miR156 and miR157, which act by repressing the expression of SBP/SPL transcription factors. SBP/SPL proteins regulate a wide variety of processes in shoot development, including flowering time and inflorescence development. Answers to long-standing questions about the relationship between vegetative and reproductive maturation have come from genetic analyses of the transcriptional and post-transcriptional regulatory networks in which these proteins are involved. Studies conducted over several decades indicate that carbohydrates have a significant effect on phase-specific leaf traits, and recent research suggests that sugar may be the leaf signal that promotes vegetative phase change.

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Section: Molecular Insights Into the Phenomenology Of Vegetative Pmentioning

confidence: 88%

Vegetative Phase Change and Shoot Maturation in Plants

Poethig

2013

Current Topics in Developmental Biology

250

217

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“…(); 27, Court (); 28, Court & Mitchell (); 29, Court & Mitchell (); 30, Day (); 31, Day et al . (); 32, Enright (); 33, Enright et al . (); 34, Esler & Astridge (); 35, Hamilton & Atkinson (); 36, Knightbridge & Ogden (); 37, Lusk & Ogden (); 38, Lusk et al .…”

Section: Preliminariesmentioning

confidence: 99%

Disturbance regimes, gap‐demanding trees and seed mass related to tree height in warm temperate rain forests worldwide

et al. 2013

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For tropical lowland rain forests, Denslow (1987) hypothesized that in areas with large-scale disturbances tree species with a high demand for light make up a larger proportion of the flora; results of tests have been inconsistent. There has been no test for warm temperate rain forests (WTRFs), but they offer a promising testing ground because they differ widely in the extent of disturbance. WTRF is dominated by microphylls sensu Raunkiaer and has a simpler structure and range of physiognomy than tropical or subtropical rain forests. It occurs in six parts of the world: eastern Asia, New Zealand, Chile, South Africa, SE Australia and the Azores. On the Azores it has been mostly destroyed, so we studied instead the subtropical montane rain forest (STMRF) on the Canary Islands which also represents a relict of the kind of WTRF that once stretched across southern Eurasia. We sought to find whether in these six regions the proportion of tree species needing canopy gaps for establishment reflects the frequency and/or extent of canopy disturbance by wind, landslide, volcanic eruptions (lava flow and ash fall), flood or fire. We used standard floras and ecological accounts to draw up lists of core tree species commonly reaching 5 m height. We excluded species which are very rare, very localized in distribution, or confined to special habitats, e.g. coastal forests or rocky sites. We used published accounts and our own experience to classify species into three groups: (1) needing canopy gaps for establishment; (2) needing either light shade throughout or a canopy gap relatively soon (a few months or years) after establishment; and (3) variously more shade-tolerant. Group 1 species were divided according the kind of canopy opening needed: tree-fall gap, landslide, lava flow, flood or fire. Only some of the significant differences in proportion of Group 1 species were consistent with differences in the extent of disturbance; even in some of those cases other factors seem likely to have had a major determining influence during evolution. We also sought to determine whether the species that are at least 'short-term persistent' in the soil seed bank (lasting 2-4 years) are all species needing canopy gaps for establishment. The answer was negative; large numbers of seeds of some shade-tolerants accumulate in the soil, and these species are able to benefit from soil disturbance in deep shade. We found a significant and strong positive relationship in Japan between mean seed mass and mature tree height, a weak positive relationship in New Zealand and no relationship in any of the other four regions. When comparing the seed mass values of Group 1 and Group 3 species we obtained different answers depending on whether or not we confined ourselves to taxonomically controlled contrasts. In only two of the four regions with an appreciable number of species in Group 1 is the mean seed mass of such species significantly lower than that of Group 3 species when taxonomic relatedness is ignored.

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“…Heteroblasty reflects plasticity in plant development, where leaf morphology is modified during the mature vegetative phase for efficient light capture for photosynthesis (Day et al 1997). In Arabidopsis, the elliptical mature leaf possesses almost twice as much lamina as a round juvenile leaf of the same width.…”

Section: Gte6 Specifies Mature Leaf Developmentmentioning

confidence: 99%

“…In Arabidopsis, juvenile leaves are round with a sharp boundary between the lamina and petiole, whereas the lamina of mature leaves is larger and elliptical, with an obtuse angle between the lamina and petiole (Lawson and Poethig 1995;Theodoris et al 2003). Heteroblasty is an important developmental process, whereby leaf morphology is modified for efficient light capture, because of differences in the light environment and the size of the shoot between juvenile and mature vegetative phases (Day et al 1997;Kerstetter and Poethig 1998).…”

mentioning

confidence: 99%

The bromodomain protein GTE6 controls leaf development in Arabidopsis by histone acetylation at ASYMMETRIC LEAVES1

Chua¹,

Channelière²,

Mott³

et al. 2005

Genes Dev.

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The transition from the juvenile to the mature phase during vegetative development in plants is characterized by changes in leaf shape. We show that GENERAL TRANSCRIPTION FACTOR GROUP E6 (GTE6) regulates differences in leaf patterning between juvenile and mature leaves in Arabidopsis. GTE6 encodes a novel small bromodomain-containing protein unique to plants. Mutations in GTE6 disrupt the formation of elliptical leaf laminae in mature leaves, whereas overexpression of GTE6 resulted in elongated juvenile leaves. GTE6 positively regulates the expression of ASYMMETRIC LEAVES1 (AS1), which encodes a myb-domain protein that controls proximodistal patterning of leaves. Using chromatin immunoprecipitation (ChIP) assays, we show that GTE6 is associated with the promoter and the start of the transcribed region of AS1 and up-regulates expression of AS1 through acetylation of histones H3 and H4. Genetic studies demonstrated that AS1 is epistatic to GTE6, indicating that GTE6 regulates AS1 during leaf morphogenesis. Chromatin remodeling at AS1 is a key regulatory mechanism in leaf development, which ensures the continual production of mature leaves following juvenile-adult transition, thereby maintaining the identity of the mature vegetative phase.[Keywords: Arabidopsis; bromodomain protein; heteroblasty; histone acetylation; phase transition] Supplemental material is available at http://www.genesdev.org.

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Vegetative Architecture ofElaeocarpus hookerianus.Transition from Juvenile to Adult

Cited by 40 publications

References 16 publications

Vegetative Phase Change and Shoot Maturation in Plants

Vegetative Phase Change and Shoot Maturation in Plants

Disturbance regimes, gap‐demanding trees and seed mass related to tree height in warm temperate rain forests worldwide

The bromodomain protein GTE6 controls leaf development in Arabidopsis by histone acetylation at ASYMMETRIC LEAVES1

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