LAM-1 and FAT Genes Control Development of the Leaf Blade in Nicotiana sylvestris

1993 ◽  
Vol 5 (9) ◽  
pp. 1029 ◽  
Author(s):  
Neil A. McHale
Keyword(s):  
Leaf Blade ◽  
Nicotiana Sylvestris

scholarly journals WOX9 functions antagonistic to STF and LAM1 to regulate leaf blade expansion in Medicago truncatula and Nicotiana sylvestris

2020 ◽  
Vol 229 (3) ◽  
pp. 1582-1597
Author(s):  
Tezera W. Wolabu ◽  
Hui Wang ◽  
Dimiru Tadesse ◽  
Fei Zhang ◽  
Marjan Behzadirad ◽  
...  
Keyword(s):  
Medicago Truncatula ◽  
Leaf Blade ◽  
Nicotiana Sylvestris

LAM1 is required for dorsoventrality and lateral growth of the leaf blade in Nicotiana

Development ◽  
1998 ◽  
Vol 125 (21) ◽  
pp. 4235-4243 ◽  
Author(s):  
N.A. McHale ◽  
M. Marcotrigiano
Keyword(s):  
Leaf Blade ◽  
Cell Types ◽  
Nicotiana Sylvestris ◽  
Lateral Growth ◽  
Lateral Plane ◽  
Cell Layers ◽  
Periclinal Chimeras ◽  
Autonomous Movement

The role of LAM1 in dorsoventrality and lateral growth of the leaf blade was investigated in the ‘bladeless’ lam1 mutant of Nicotiana sylvestris and in periclinal chimeras with lam1 and wild-type (N. glauca) cell layers. Mutant lam1 primordia show normal dorsoventrality at emergence, but produce blade tissue that lacks dorsal cell types and fails to expand in the lateral plane. In leaves of a lam1-glauca-glauca (L1-L2-L3) chimera, we observed restoration of dorsal identity in the lam1 upper epidermis, suggesting non-cell-autonomous movement of a dorsalizing factor between cell layers of the blade. A lam1-lam1-glauca chimera generated a leaf blade with lam1 cells in the L1-derived epidermis and the L2-derived upper and lower mesophyll. An in situ lineage analysis revealed that N. glauca cells in the L3-derived middle mesophyll restore palisade differentiation in the adjoining lam1 upper mesophyll. Movement of dorsalizing information appears short-range, however, having no effect on the upper lam1 epidermis in lam1-lam1-glauca. Clusters of lam1 mesophyll in distal or proximal positions show a localized default to radial growth, indicating that the LAM1 function is required for dorsoventrality and lateral growth throughout blade expansion.

scholarly journals LAM-1 and FAT Genes Control Development of the Leaf Blade in Nicotiana sylvestris.

1993 ◽  
pp. 1029-1038 ◽  
Author(s):  
N. A. McHale
Keyword(s):  
Leaf Blade ◽  
Nicotiana Sylvestris

scholarly journals WOX9 functions antagonistic to STF and LAM1 to regulate leaf blade expansion in Medicago truncatula and Nicotiana sylvestris

2020 ◽  
Author(s):  
Tezera W. Wolabu ◽  
Hui Wang ◽  
Dimiru Tadesse ◽  
Fei Zhang ◽  
Marjan Behzadirad ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Medicago Truncatula ◽  
Transcriptional Activation ◽  
Leaf Blade ◽  
Ectopic Expression ◽  
Nicotiana Sylvestris ◽  
Leaf Morphogenesis ◽  
Cell Proliferation And Differentiation ◽  
Proliferation And Differentiation ◽  
Wox Genes

AbstractPlant specific WOX family transcription factors are known to regulate embryogenesis, meristem maintenance and lateral organ development. Modern clade WOX genes function through a transcriptional repression mechanism, and the intermediate clade transcriptional activator WOX9 functions with the repressor WOX genes in embryogenesis and meristems maintenance, but the mechanism of this interaction is unclear. WOX1 homologues STF and LAM1 are required for leaf blade outgrowth in Medicago truncatula and Nicotiana Sylvestris, respectively. Here we show that WOX9 negatively regulates leaf blade outgrowth and functions antagonistically to STF and LAM1. While NsWOX9 ectopic expression enhances the lam1 mutant phenotype, and antisense expression partially rescues the lam1 mutant, both overexpression of NsWOX9 and knockout by CRISPR/Cas9 genome editing in N. sylvestris resulted in a range of severe leaf blade distortions, indicating that controlled negative regulation by NsWOX9 is required for proper blade development. Our results indicate that direct repression of WOX9 transcriptional activation activity by the transcriptional repressor STF/LAM1 is required for correct blade architecture and patterning in M. truncatula and N. sylvestris. These findings suggest that a balance between transcriptional activation and repression mechanisms by direct interaction of activator and repressor WOX genes may be required for cell proliferation and differentiation homeostasis, and could be an evolutionarily conserved mechanism for the development of complex and diverse morphology in higher plants.One sentence summaryWOX9 negatively regulates blade outgrowth antagonizing STF function but directly repressed by STF indicating WOX-mediated homeostasis in cell proliferation and differentiation during leaf morphogenesis.

Variability of Anatomical Features of Leaf Blade in Species of Genus Magnolia L. on the First Ontomorphogenesis Stages

2020 ◽  
Vol 52 (4) ◽  
pp. 26-37
Author(s):  
Oxana A. Futornа ◽  
Vladislava A. Badanina ◽  
Marina N. Gaidarzhy ◽  
Anastasiya V. Golubenko ◽  
Nataliya Yu. Taran
Keyword(s):  
Leaf Blade ◽  
Anatomical Features

Barban Selectivity for Wild Oat in Wheat

Weed Science ◽  
1974 ◽  
Vol 22 (5) ◽  
pp. 476-480 ◽  
Author(s):  
Robert W. Neidermyer ◽  
John D. Nalewaja
Keyword(s):  
Triticum Aestivum ◽  
Air Temperature ◽  
Leaf Blade ◽  
Plant Morphology ◽  
Treatment Temperature ◽  
Avena Fatua ◽  
Post Treatment ◽  
Wild Oat ◽  
Wheat Growth ◽  
Wild Oats

The response of wheat (Triticum aestivum L.) and wild oat (Avena fatua L.) to barban (4-chloro-2-butynyl-m-chlorocarbanilate) was studied as influenced by plant morphology and air temperature after application. Growth of wheat and wild oat seedlings was reduced by barban at 0.3 μg and 0.6 μg applied to the first node, respectively. Barban application to the base and midpoint of the first leaf blade required a lower dose to reduce wild oat growth than wheat growth. Increased tillering occurred from barban injury to the main culm in wheat. Wheat and wild oat susceptibility to barban increased as the post-treatment temperature decreased from 32 to 10 C. Barban selectivity for wild oats in wheat was greater at 27 and 21 C than at 16 and 10 C.

Preliminary Studies on Thickness of Nondestructive Rice (Oryza sativa L.) Leaf Blade

2007 ◽  
Vol 6 (7) ◽  
pp. 802-807 ◽  
Author(s):  
You-ding CHEN ◽  
Xu ZHANG ◽  
Xin-qiao ZHOU ◽  
Guan-hua CHEN
Keyword(s):  
Oryza Sativa ◽  
Leaf Blade ◽  
Oryza Sativa L

scholarly journals Carbon Partitioning and Growth of a Starchless Mutant of Nicotiana sylvestris

1992 ◽  
Vol 99 (4) ◽  
pp. 1449-1454 ◽  
Author(s):  
Steven C. Huber ◽  
Kenneth R. Hanson
Keyword(s):  
Nicotiana Sylvestris ◽  
Carbon Partitioning ◽  
Starchless Mutant
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