scholarly journals TheSelaginellarhizophore has a unique transcriptional identity compared with root and shoot meristems

2019 ◽  
Vol 222 (2) ◽  
pp. 882-894 ◽  
Author(s):  
Alison Mello ◽  
Idan Efroni ◽  
Ramin Rahni ◽  
Kenneth D. Birnbaum
Keyword(s):  
Shoot Meristems

Origin and Development of Adventitious Shoot Meristems Initiated on Plant Chimeras

1993 ◽  
Vol 155 (1) ◽  
pp. 259-269 ◽  
Author(s):  
Hui-cheng Tian ◽  
Michael Marcotrigiano
Keyword(s):  
Adventitious Shoot ◽  
Shoot Meristems

Nuclear proteins of quiescent and mitotically active cells in shoot meristems of Tradescantia paludosa

1974 ◽  
Vol 52 (9) ◽  
pp. 2049-2053 ◽  
Author(s):  
R. S. Tobin ◽  
Kyu-Byung Yun ◽  
J. M. Naylor
Keyword(s):  
Nuclear Proteins ◽  
Zone Of Inhibition ◽  
Interphase Nuclei ◽  
Lateral Buds ◽  
Dye Binding ◽  
Tradescantia Paludosa ◽  
Shoot Meristems

In inhibited lateral buds of Tradescantia paludosa, interphase nuclei in the apical zone of inhibition contain higher levels of arginine per unit DNA than those of mitotically active cells in interphase or prophase. Supplementary dye-binding experiments suggest that this reflects a corresponding difference between the composition of the histone complement of chromatin in the two cells populations. The possible implications of this phenomenon are discussed.

scholarly journals Plant Regeneration via Somatic Embryogenesis from Leaf and Floral Explants of ‘Chancellor’ Wine Grape

1970 ◽  
Vol 20 (2) ◽  
pp. 157-170 ◽  
Author(s):  
Richard M.S. Mulwa ◽  
Margaret M.A. Norton ◽  
Robert M. Skirvin
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Basal Medium ◽  
Limiting Factor ◽  
Half Strength ◽  
Conversion Stage ◽  
Cotyledon Expansion ◽  
Floral Explants ◽  
Shoot Meristems

Abundant embryogenic callus was obtained from leaf and floral explants of "Chancellor" grape by continuous culture for 12 weeks on Nitsch and Nitsch basal medium supplemented with 9 μM 2, 4-D + 17 μM IASP + either 1 μM BA or 1 μM TDZ (ECIM) in darkness. They were successfully maintained by a five to six week subculture interval on NN medium containing 2 μM 2, 4-D + 0.2 μM TDZ + 4 μM IASP (LTMM). Near synchronous embryo developed from embryogenic callus on medium containing 10 μM IASP + 8 μM NOA + 1 μM TDZ + 1 μM ABA + 2.5 g/l AC (EDMM).  Individually separated somatic embryos were germinated on both NN and half strength of MS containing 0.5 μM BA + 0.025 μM NAA, respectively; normal plantlet conversion from embryos was low (35%).  Whole fruiting plants were obtained. Aberrant embryo development was characterized by failure to form functional shoot meristems following the initial cotyledon expansion during germination. These observations indicate that the embryo conversion stage of the regeneration is difficult and remains a limiting factor requiring more empirical experimentation for improvement in grape tissue culture.   Key words: Chancellor grape, Regeneration, Somatic embryogenesis   D.O.I. 10.3329/ptcb.v20i2.6895   Plant Tissue Cult. & Biotech. 20(2): 157-170, 2010 (December)

scholarly journals Author response: Mechanical stress contributes to the expression of the STM homeobox gene in Arabidopsis shoot meristems

2015 ◽  
Author(s):  
Benoît Landrein ◽  
Annamaria Kiss ◽  
Massimiliano Sassi ◽  
Aurélie Chauvet ◽  
Pradeep Das ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Homeobox Gene ◽  
Author Response ◽  
Shoot Meristems

The WUSCHEL gene is required for shoot and floral meristem integrity in Arabidopsis

Development ◽  
1996 ◽  
Vol 122 (1) ◽  
pp. 87-96 ◽  
Author(s):  
T. Laux ◽  
K.F. Mayer ◽  
J. Berger ◽  
G. Jurgens
Keyword(s):  
Developmental Stages ◽  
Shoot Meristem ◽  
Wild Type ◽  
Recessive Mutations ◽  
Organ Identity ◽  
Flat Structures ◽  
Meristem Identity ◽  
Wus Gene ◽  
Floral Meristems ◽  
Shoot Meristems

Self perpetuation of the shoot meristem is essential for the repetitive initiation of shoot structures during plant development. In Arabidopsis shoot meristem maintenance is disrupted by recessive mutations in the WUSCHEL (WUS) gene. The defect is evident at all developmental stages and is restricted to shoot and floral meristems, whereas the root meristem is not affected. wus mutants fail to properly organize a shoot meristem in the embryo. Postembryonically, defective shoot meristems are initiated repetitively but terminate prematurely in aberrant flat structures. In contrast to wild-type shoot meristems, primordia initiation occurs ectopically across mutant apices, including the center, and often new shoot meristems instead of organs are initiated. The cells of wus shoot apices are larger and more vacuolated than wild-type shoot meristem cells. wus floral meristems terminate prematurely in a central stamen. Double mutant studies indicate that the number of organ primordia in the center of wus flowers is limited, irrespective of organ identity and we propose that meristem cells are allocated into floral whorl domains in a sequential manner. WUS activity also appears to be required for the formation of supernumerary organs in the center of agamous, superman or clavata1 flowers, suggesting that the WUS gene acts upstream of the corresponding genes. Our results suggest that the WUS gene is specifically required for central meristem identity of shoot and floral meristems to maintain their structural and functional integrity.

Culture of Shoot Meristems: Pea∗∗NRCC No. 22967.

1984 ◽  
pp. 106-110
Author(s):  
K.K. Kartha
Keyword(s):  
Shoot Meristems

scholarly journals Low rate of somatic mutations in a long-lived oak tree

2017 ◽  
Author(s):  
Namrata Sarkar ◽  
Emanuel Schmid-Siegert ◽  
Christian Iseli ◽  
Sandra Calderon ◽  
Caroline Gouhier-Darimont ◽  
...  
Keyword(s):  
Stem Cells ◽  
Somatic Mutations ◽  
Single Nucleotide Variants ◽  
Single Nucleotide ◽  
Cell Divisions ◽  
Gamete Formation ◽  
Oak Tree ◽  
Sequential Appearance ◽  
Low Rate ◽  
Shoot Meristems

Because plants do not possess a proper germline, deleterious somatic mutations can be passed to gametes and a large number of cell divisions separating zygote from gamete formation in long-lived plants may lead to many mutations. We sequenced the genome of two terminal branches of a 234-year-old oak tree and found few fixed somatic single-nucleotide variants (SNVs), whose sequential appearance in the tree could be traced along nested sectors of younger branches. Our data suggest that stem cells of shoot meristems are robustly protected from accumulation of mutations in trees.

Gene expression analysis in microdissected shoot meristems of Brassica napus microspore-derived embryos with altered SHOOTMERISTEMLESS levels

Planta ◽  
2012 ◽  
Vol 237 (4) ◽  
pp. 1065-1082 ◽  
Author(s):  
Mohamed Elhiti ◽  
Owen S. D. Wally ◽  
Mark F. Belmonte ◽  
Ainsley Chan ◽  
Yongguo Cao ◽  
...  
Keyword(s):  
Gene Expression ◽  
Brassica Napus ◽  
Expression Analysis ◽  
Gene Expression Analysis ◽  
Shoot Meristems

scholarly journals Incipient stem cell niche conversion in tissue culture: using a systems approach to probe early events inWUSCHEL-dependent conversion of lateral root primordia into shoot meristems

2013 ◽  
Vol 73 (5) ◽  
pp. 798-813 ◽  
Author(s):  
Steven P. Chatfield ◽  
Resmi Capron ◽  
Andre Severino ◽  
Pier-Andree Penttila ◽  
Simon Alfred ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Stem Cell ◽  
Lateral Root ◽  
Stem Cell Niche ◽  
Systems Approach ◽  
Root Primordia ◽  
Lateral Root Primordia ◽  
Cell Niche ◽  
Shoot Meristems

scholarly journals CaJOINTLESS is a MADS-box gene involved in suppression of vegetative growth in all shoot meristems in pepper

2012 ◽  
Vol 63 (13) ◽  
pp. 4947-4957 ◽  
Author(s):  
O. Cohen ◽  
Y. Borovsky ◽  
R. David-Schwartz ◽  
I. Paran
Keyword(s):  
Vegetative Growth ◽  
Mads Box ◽  
Mads Box Gene ◽  
Shoot Meristems
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