Thermal Environment During Endosperm Cell Division and Grain Filling in Maize: Effects on Kernel Growth and Development in Vitro 1

Crop Science ◽  
1984 ◽  
Vol 24 (1) ◽  
pp. 133-137 ◽  
Author(s):  
R. J. Jones ◽  
S. Quattar ◽  
R. K. Crookston
Keyword(s):  
Cell Division ◽  
Growth And Development ◽  
Thermal Environment ◽  
Grain Filling ◽  
Endosperm Cell ◽  
Development In Vitro ◽  
Kernel Growth

scholarly journals Recombinant human megakaryocyte growth and development factor stimulates thrombocytopoiesis in normal nonhuman primates

Blood ◽  
1995 ◽  
Vol 86 (1) ◽  
pp. 54-59 ◽  
Author(s):  
AM Farese ◽  
P Hunt ◽  
T Boone ◽  
TJ MacVittie
Keyword(s):  
Bone Marrow ◽  
Peripheral Blood ◽  
Growth And Development ◽  
Nonhuman Primates ◽  
Normal Male ◽  
Platelet Counts ◽  
Development Factor ◽  
Development In Vitro

Megakaryocyte growth and development factor (MGDF) is a novel cytokine that binds to the c-mpl receptor and stimulates megakaryocyte development in vitro and in vivo. This report describes the ability of recombinant human (r-Hu) MGDF to affect megakaryocytopoiesis in normal nonhuman primates. r-HuMGDF was administered subcutaneously to normal, male rhesus monkeys once per day for 10 consecutive days at dosages of 2.5, 25, or 250 micrograms/kg of body weight. Bone marrow and peripheral blood were assayed for clonogenic activity and peripheral blood counts were monitored. Circulating platelet counts increased significantly (P < .05) for all doses within 6 days of r-HuMGDF administration and reached maximal levels between day 12 and day 14 postcytokine administration. The 2.5, 25.0, and 250.0 micrograms/kg/d doses elicited peak mean platelet counts that were 592%, 670%, and 449% of baseline, respectively. Bone marrow-derived clonogenic data showed significant increases in the concentration of megakaryocyte (MEG)- colony-forming unit (CFU) and granulocyte-erythroid-macrophage- megakaryocyte (GEMM)-CFU, whereas that of granulocyte-macrophage (GM)- CFU and burst-forming unit-erythroid (BFU-e) remained unchanged during the administration of r-HuMGDF. These data show that r-HuMGDF is a potent stimulator of thrombocytopoiesis in the normal nonhuman primate.

Application of abscisic acid regulates antioxidant enzymes activities and modulates endosperm cell division in winter wheat

2016 ◽  
Vol 96 (2) ◽  
pp. 283-295 ◽  
Author(s):  
Dongqing Yang ◽  
Dian Peng ◽  
Wei Yang ◽  
Yanping Yin ◽  
Yong Li ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Abscisic Acid ◽  
Cell Division ◽  
Grain Filling ◽  
Grain Weight ◽  
Endosperm Cell ◽  
Filling Rate ◽  
Flag Leaves ◽  
Grain Filling Rate ◽  
Antioxidant Enzymes Activities

Effects of exogenous abscisic acid (ABA) on antioxidant enzymes activities and endosperm cell division of two wheat (Triticum aestivum L.) cultivars were investigated. Results showed that the superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activity in flag leaves of both cultivars is elevated by application of ABA and it is correlated with less membrane damage: lower malondialdehyde (MDA). Exogenous ABA significantly increased endosperm cell number and endosperm division rate, finally increased grain weight. Although ABA treatment decreased endogenous zeatin riboside (ZR) content in flag leaves from 7 to 28 days after anthesis (DAA), indole acetic acid (IAA) levels were significantly increased by spraying with ABA. Correlation analysis showed that endogenous contents of ZR, ABA, and IAA in grains were positively and significantly correlated with grain-filling rate. IAA content in leaves was positively and significantly correlated with grain-filling rate. The results suggested that increased grain weight of ABA-treated plants was due to higher antioxidant abilities of flag leaf resulting in longer maintenance of photosynthetic capacity and higher grain-filling rate.

scholarly journals Effects of different types of sugars and plant growth regulators on kohlrabi seedling growth and development in vitro

2020 ◽  
Vol 72 (3) ◽  
pp. 349-357
Author(s):  
Tatjana Cosic ◽  
Jelena Savic ◽  
Martin Raspor ◽  
Aleksandar Cingel ◽  
Nabil Ghalawnji ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Growth And Development ◽  
Different Types ◽  
Half Strength ◽  
Plant Stem ◽  
Development In Vitro ◽  
Vitro Development

Kohlrabi (Brassica oleracea var. gongylodes), with its edible stem tuber formed at the base of the plant stem, presents a valuable source of nutrients. The potential effects of plant growth regulators (PGRs), as well as various concentrations of different sugars on the in vitro development of kohlrabi were studied. Ten-day-old kohlrabi seedlings were cultivated in vitro for 5 weeks at 18?2?C on half-strength MS media containing different concentrations of carbon source such as sucrose, fructose, glucose, xylose and mannitol, combined with or without specific plant growth regulators (N6-benzyladenine (BA), gibberellic acid (GA3), 2,3,5-triiodobenzoic acid (TIBA)). Results showed no tuber formation in all treatments, but growth and development of treated kohlrabi seedlings was significantly affected in a distinctive manner, with a variety of morphological traits being altered in comparison to matching controls.

scholarly journals The photoperiodic control of growth and development of Chenopodium rubrum L. plants in vitro

2007 ◽  
Vol 59 (3) ◽  
pp. 203-208 ◽  
Author(s):  
Aleksandra Mitrovic ◽  
Z. Giba ◽  
Ljubinka Culafic
Keyword(s):  
Life Cycle ◽  
Plant Growth ◽  
Seed Development ◽  
Growth And Development ◽  
Reproductive Development ◽  
Day Length ◽  
Chenopodium Rubrum ◽  
Development In Vitro ◽  
Photoperiod Sensitive

Influence of the photoperiod on growth, flowering, and seed development in vitro of Chenopodium rubrum L., a short day annual, was examined. Chenopodium rubrum plants modify their growth and reproductive development in accordance with the photoperiod. With an increase of day length, growth was stimulated, flowering was delayed, seed development occurred earlier, and the plants produced more seeds. By altering photoperiods during induction and evocation of flowering, it is shown that the photoperiod experienced by seedlings during early reproductive development determines the pattern of plant growth to the end of ontogenesis, the time to flowering, and the course of seed development. It is therefore concluded that growth and reproductive development of C. rubrum are photoperiod-sensitive to during a precise short part of its life cycle. .

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