Low-Temperature-Induced GA3 Sensitivity of Wheat. VI. Effect of Inhibitors of Lipid Biosynthesis on α-Amylase Production by Dwarf (Rht3) and Tall (Rht) Wheat, and on Lipid Metabolism of Tall Wheat Aleurone Tissue

1986 ◽  
Vol 13 (3) ◽  
pp. 409 ◽  
Author(s):  
SP Singh ◽  
LG Paleg
Keyword(s):  
Lipid Metabolism ◽  
Low Temperature ◽  
Gibberellic Acid ◽  
Lipid Biosynthesis ◽  
Phospholipid Synthesis ◽  
Acid Sensitivity ◽  
Amylase Production ◽  
Aleurone Tissue ◽  
Effect Of Inhibitors

The effects of six inhibitors, gammexane, diclofop-methyl, chlorpromazine, trifluoperazine, BASF 13-338 and SK&F 7997-A3, known to be involved in the inhibition of lipid biosynthesis, on the α-amylase response and lipid metabolism of the dwarf and tall wheats were examined. The results are discussed in the light of the proposed relationship between the rht alleles, phospholipid synthesis and gibberellic acid-sensitivity.

Low-Temperature-Induced GA3 Sensitivity of Wheat. III. Comparison of Low Temperature Effects on α-Amylase Production by Aleurone Tissue of Dwarf and Tall Wheat

1985 ◽  
Vol 12 (3) ◽  
pp. 269 ◽  
Author(s):  
SP Singh ◽  
LG Paleg
Keyword(s):  
Low Temperature ◽  
Gibberellic Acid ◽  
Temperature Effects ◽  
Temperature Response ◽  
Lag Time ◽  
Receptor Sites ◽  
Amylase Production ◽  
Aleurone Tissue ◽  
Temperature Exposure ◽  
Low Temperature Exposure

The low temperature effect on the gibberellic acid (GA3) sensitivity (measured as a-amylase production) of aleurone tissue or deembryonated seed of dwarf and tall wheat (F6 Rht 3/rht 3 isogenic lines) was studied. The results indicated that the low-temperature-induced increase in GA3 response is: quantitative and temporal; GA3 concentration-dependent; without effect on the lag-time of a-amylase production, and operative in the aleurone tissue of dwarf (Rht 3-containing) wheat. All these characteristics of the low temperature response of the Rht 3-containing aleurone tissue are similar to those reported earlier for Rht 1-containing and Rht 2-containing aleurone tissue. The present results support the hypothesis that low temperature exposure is able to cure or reverse the genetic lesions manifest in the aleurone tissue containing the Rht allele and that this may be mediated via an increase in GA3 receptor sites.

Low Temperature-Induced GA3 Sensitivity of Wheat. IV. Comparison of Low Temperature Effects on the Phospholipids of Aleurone Tissue of Dwarf and Tall Wheat

1985 ◽  
Vol 12 (3) ◽  
pp. 277 ◽  
Author(s):  
SP Singh ◽  
LG Paleg
Keyword(s):  
Fatty Acid ◽  
Low Temperature ◽  
Gibberellic Acid ◽  
Temperature Effects ◽  
Temporal Relationship ◽  
Phospholipid Metabolism ◽  
Isogenic Lines ◽  
Receptor Sites ◽  
Aleurone Tissue ◽  
Close Temporal Relationship

Low temperature effects on the phospholipids of F6 Rht 3/rht 3 isogenic lines of wheat were studied. Significant low-temperature-induced (5°C) augmentation in the phospholipids of the dwarf selection were detected. More specifically, a 20 h-5°C preincubation enhanced considerably the levels of phosphatidylinositol, phosphatidylcholine and phosphatidylethanolamine in the aleurone tissue of the dwarf selection. In addition, these changes displayed a very close temporal relationship with the low- temperature-induced increase in gibberellic acid (GA3) sensitivity. In the case of the tall selection, only the imbibition of water was required to initiate the synthesis of major phospholipids of its aleurone tissue and low temperature preincubation had no effect on either the phospholipids or their fatty acid constituents. These results are discussed in the light of the hypotheses that GA3 receptor sites are membrane-based lipids and that the Rht gene causes an aberration in the phospholipid metabolism of the aleurone tissue which can be corrected by low temperature.

scholarly journals Bioassay of Winter Wheat for Gibberellic Acid Sensitivity

2013 ◽  
Vol 04 (10) ◽  
pp. 2015-2022 ◽  
Author(s):  
Alexander D. Pavlista ◽  
Dipak K. Santra ◽  
David D. Baltensperger
Keyword(s):  
Gibberellic Acid ◽  
Winter Wheat ◽  
Acid Sensitivity

Enhancement by Low Temperatures of the Anaerobic Induction of Cocklebur Seed Germination

1977 ◽  
Vol 4 (6) ◽  
pp. 849 ◽  
Author(s):  
Y Esashi ◽  
Y Ohhara
Keyword(s):  
Seed Germination ◽  
Low Temperature ◽  
Gibberellic Acid ◽  
Low Temperatures ◽  
Anaerobic Treatment ◽  
Maximal Response ◽  
Benzyl Adenine ◽  
Anaerobic Induction ◽  
Time Period ◽  
Proportional Increase

Non-dormant, upper cocklebur (Xanthium pensylvanicum Wallr.) seeds, incapable of germinating under ordinary conditions, can germinate when previously subjected to anaerobiosis; this has been termed the anaerobic induction of seed germination. Aerobic presoaking of the seeds was also required for successful anaerobic induction, and exerted two counter-acting effects on seed germination. When the time period of aerobic presoaking was sufficiently prolonged, the increasing duration of an anaerobic treatment resulted in proportional increase of germination potential but, when it was short, the effect of the anaerobiosis was saturated in a few days. Prolonging the aerobic presoaking period caused less response of the seed to the anaerobic induction, suggesting the development of some germination-inhibiting system during the aerobic presoaking period. This system could not develop in the absence of O2 or at low temperature. Thus, low temperature during prolonged presoaking produced a maximal response to anaerobic induction. Various germination stimulants, CO2, ethylene, gibberellic acid and benzyl adenine, did not significantly alter the effects of the presoaking.

Effects of low temperature on longevity and lipid metabolism in the marine rotifer Brachionus koreanus

2020 ◽  
Vol 250 ◽  
pp. 110803
Author(s):  
Min-Chul Lee ◽  
Deok-Seo Yoon ◽  
Yoseop Lee ◽  
Hyuntae Choi ◽  
Kyung-Hoon Shin ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Low Temperature ◽  
Brachionus Koreanus ◽  
Marine Rotifer
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