Effects of Ethephon on Key Enzymes of Sucrose Metabolism in Relation to Sucrose Accumulation in Sugarcane

Sugar Tech ◽  
2013 ◽  
Vol 15 (2) ◽  
pp. 177-186 ◽  
Author(s):  
Ai-Qin Wang ◽  
Wen-Jing Huang ◽  
Jun-Qi Niu ◽  
Ming Liu ◽  
Li-Tao Yang ◽  
...  
Keyword(s):  
Sucrose Metabolism ◽  
Sucrose Accumulation ◽  
Key Enzymes

scholarly journals Phosphomannose isomerase affects the key enzymes of glycolysis and sucrose metabolism in transgenic sugarcane overexpressing the manA gene

2015 ◽  
Vol 35 (3) ◽  
Author(s):  
Muqing Zhang ◽  
Xiaolei Zhuo ◽  
Jihua Wang ◽  
Chuanyu Yang ◽  
Charles A. Powell ◽  
...  
Keyword(s):  
Sucrose Metabolism ◽  
Phosphomannose Isomerase ◽  
Key Enzymes ◽  
Transgenic Sugarcane

Effect of Plant Growth Regulators on Key Enzymes in Sucrose Metabolism of Ear Leaf and Grain at Filling Stage of Spring Maize

2016 ◽  
Vol 42 (8) ◽  
pp. 1215 ◽  
Author(s):  
Guang-Yan LI ◽  
Qing-Yan WANG ◽  
Yan-Li XU ◽  
Lin LU ◽  
Liu Jiao ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Sucrose Metabolism ◽  
Key Enzymes ◽  
Filling Stage ◽  
Spring Maize

scholarly journals Aspects of Sugar Metabolism in Melon Fruit as Determinants of Fruit Quality

1994 ◽  
Author(s):  
Arthur A. Schaffer ◽  
D. Mason Pharr ◽  
Joseph Burger ◽  
James D. Burton ◽  
Eliezer Zamski
Keyword(s):  
Low Temperature ◽  
Fruit Quality ◽  
Growth And Development ◽  
Sugar Metabolism ◽  
Sucrose Metabolism ◽  
Sucrose Accumulation ◽  
Leaf Removal ◽  
The Individual ◽  
Single Enzyme ◽  
Melon Fruit

The cucurbit family, including melon, translocates the galactosyl-sucrose oligosaccharides, raffinose and stachyose, in addition to sucrose, from the source leaves to the fruit sink. The metabolism of these photoassimilates in the fruit sink controls fruit growth and development, including the horticulturally important phenomenon of sucrose accumulation, which determines melon fruit sweetness. During this research project we have characterized the complete pathway of galactosyl sucrose metabolism in developing fruit, from before anthesis until maturity. We have also compared the metabolic pathway in scurose accumulating genotypes, as compared to non-accumulating genotypes. Furthermore, we studied the pathway in different fruit tissues, in response to pollination, and also analyzed the response of the individual steps of the pathway to perturbations such as low temperature and leaf removal. The results of our studies have led to the conclusion that generally galactosyl-sucrose metabolism functions as a coordinately controlled pathway. In one case, as an immediate response to the absence of pollination, the activity of a single enzyme, UDPglu pyrophosphorylase, was drastically reduced. However, during young fruit development, sucrose accumulation, and in response to perturbations of the system, groups of enzymes, rather than single enzymes, respond in a concerted manner. Our research has characterized in detail the initial enzymes of galactosyl-sucrose metabolism, including the galactosidases, galactokinase and the UDPgal- and UDPglu pyrophosphorylases. We have discovered a novel alkaline a-galactoside which hydrolyzes both stachyose and reaffinose and thereby may have solved the dilemma of cytosolic-sucrose metabolism, since prior to this research there was no known alkaline a-galactosidase capable of hydrolyzing raffinose.

Research progresses on the key enzymes involved in sucrose metabolism in maize

2013 ◽  
Vol 368 ◽  
pp. 29-34 ◽  
Author(s):  
Xiaodong Ren ◽  
Junjie Zhang
Keyword(s):  
Sucrose Metabolism ◽  
Key Enzymes

scholarly journals The Contribution of Sucrose Metabolism Enzymes to Sucrose Accumulation in Cucumis melo

2007 ◽  
Vol 132 (5) ◽  
pp. 704-712 ◽  
Author(s):  
Yosef Burger ◽  
Arthur A. Schaffer
Keyword(s):  
Cucumis Melo ◽  
Sucrose Phosphate Synthase ◽  
Threshold Value ◽  
Sucrose Metabolism ◽  
Sugar Accumulation ◽  
Sucrose Accumulation ◽  
Soluble Acid Invertase ◽  
Metabolism Enzymes ◽  
Primary Determinant ◽  
The Relationship

The relationship between sugar accumulation and sucrose metabolism enzyme activities was studied among seven genotypes of Cucumis melo L., covering the broad genetic range of sucrose accumulation found in the species. The primary determinant correlated with sucrose levels was the genetic variation for developmental loss of soluble acid invertase (AI) activity. Sucrose accumulation in the developing fruit began only when AI activity declined to less than an experimentally determined threshold value, and continued until removal of the fruit from the plant. In addition, the activities of sucrose phosphate synthase (SPS), sucrose synthase (SuSy), and neutral invertase (NI) were all positively correlated with sucrose accumulation among the genotypes. The low-sucrose-accumulating genotypes were characterized by low activities of each of the three enzymes, irrespective of their invertase activities. Final sucrose content was best predicted for each genotype by the number of days the fruit remained attached to the plant while characterized by “sucrose accumulation metabolism,” which was characterized primarily by AI activity less than threshold values, together with SPS, SuSy, and NI activities higher than threshold levels.

Sign in / Sign up

Export Citation Format

Share Document