Organ-specific changes in the activity and subunit composition of glutamine-synthetase isoforms of barley (Hordeum vulgare L.) after growth on different levels of NH+ 4

Planta ◽  
1995 ◽  
Vol 196 (2) ◽  
Author(s):  
Gisela M�ck
Keyword(s):  
Hordeum Vulgare ◽  
Glutamine Synthetase ◽  
Subunit Composition ◽  
Hordeum Vulgare L ◽  
Organ Specific ◽  
Different Levels

EFFECTS OF 2,4-D AND ZEATIN RIBOSIDE ON POLLEN CALLUS INDUCTION IN BARLEY ANTHER CULTURE

1985 ◽  
Vol 65 (1) ◽  
pp. 29-32 ◽  
Author(s):  
J. M. YE ◽  
B. L. HARVEY ◽  
K. N. KAO
Keyword(s):  
Hordeum Vulgare ◽  
Anther Culture ◽  
Callus Induction ◽  
Callus Formation ◽  
Zeatin Riboside ◽  
Optimal Range ◽  
Hordeum Vulgare L ◽  
Obvious Effect ◽  
High Concentrations ◽  
Different Levels

Anthers of two barley (Hordeum vulgare L.) cultivars, Bonanza and Elrose were cultured in media A or K1 with different levels of 2,4-D and zeatin riboside (Z-r). The results indicated that a combination of 2,4-D and Z-r in their optimal ranges (0.25–1.0 mg/L and 0.125–0.25 mg/L, respectively) significantly increased pollen callus induction in Bonanza anthers. Addition of 2,4-D alone (optimal range 0.25–2.0 mg/L) increased the frequency of callus formation in Elrose, while Z-r (0.125–2.0 mg/L) had no obvious effect on callus induction. When Z-r concentration was higher than 2.0 mg/L it decreased callus formation. At high concentrations (2.0–4.0 mg/L) 2,4-D alone induced loose calli which were not able to develop into plantlets.Key words: Barley, anther culture, 2,4-D, zeatin riboside

The allene oxide cyclase of barley (Hordeum vulgare L.)—cloning and organ-specific expression

2004 ◽  
Vol 65 (7) ◽  
pp. 801-811 ◽  
Author(s):  
Helmut Maucher ◽  
Irene Stenzel ◽  
Otto Miersch ◽  
Niels Stein ◽  
Manoj Prasad ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Allene Oxide ◽  
Hordeum Vulgare L ◽  
Allene Oxide Cyclase ◽  
Specific Expression ◽  
Organ Specific ◽  
Organ Specific Expression

Ultrastructure and Senescence in an Achloroplastic Mutant of Hordeum vulgare L. cv. Dyan

1992 ◽  
Vol 50 (1) ◽  
pp. 844-845
Author(s):  
R.H.M. Cross ◽  
C.E.J. Botha ◽  
A.K. Cowan ◽  
B.J. Hartley
Keyword(s):  
Cell Wall ◽  
Hordeum Vulgare ◽  
Leaf Tissue ◽  
Ultrastructural Changes ◽  
Hordeum Vulgare L ◽  
Mesophyll Cells ◽  
Lethal Mutant ◽  
Cytoplasmic Matrix ◽  
Close Proximity ◽  
Pinocytotic Vesicles

Senescence is an ordered degenerative process leading to death of individual cells, organs and organisms. The detection of a conditional lethal mutant (achloroplastic) of Hordeum vulgare has enabled us to investigate ultrastructural changes occurring in leaf tissue during foliar senescence.Examination of the tonoplast structure in six and 14 day-old mutant tissue revealed a progressive degeneration and disappearance of the membrane, apparently starting by day six in the vicinity of the mitochondria associated with the degenerating proplastid (Fig. 1.) where neither of the plastid membrane leaflets is evident (arrows, Fig. 1.). At this stage there was evidence that the mitochondrial membranes were undergoing retrogressive changes, coupled with disorganization of cristae (Fig. 2.). Proplastids (P) lack definitive prolamellar bodies. The cytoplasmic matrix is largely agranular, with few endoplasmic reticulum (ER) cisternae or polyribosomal aggregates. Interestingly, large numbers of actively-budding dictysomes, associated with pinocytotic vesicles, were observed in close proximity to the plasmalemma of mesophyll cells (Fig. 3.). By day 14 however, mesophyll cells showed almost complete breakdown of subcellular organelle structure (Fig. 4.), and further evidence for the breakdown of the tonoplast. The final stage of senescence is characterized by the solubilization of the cell wall due to expression and activity of polygalacturonase and/or cellulose. The presence of dictyosomes with associated pinocytotic vesicles formed from the mature face, in close proximity to both the plasmalemma and the cell wall, would appear to support the model proposed by Christopherson for the secretion of cellulase. This pathway of synthesis is typical for secretory glycoproteins.

ИЗМЕНЧИВОСТЬ ЯЧМЕНЯ (Hordeum vulgare L.) РАЗНОГО ГЕОГРАФИЧЕСКОГО ПРОИСХОЖДЕНИЯ ПО ЭЛЕМЕНТАМ СТРУКТУРЫ УРОЖАЯ

2012 ◽  
pp. 33-40
Author(s):  
А.В. ЖЕЛЕЗНОВ ◽  
◽  
Н.Б. ЖЕЛЕЗНОВА ◽  
Т.В. КУКОЕВА ◽  
Н.В. БУРМАКИНА ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Hordeum Vulgare L
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