PHYSIOLOGICAL AND BIOCHEMICAL STUDIES IN PLANT METABOLISM: VII. THE INVERTASE OF THE SEEDLING WHEAT LEAF

1953 ◽  
Vol 31 (1) ◽  
pp. 81-89 ◽  
Author(s):  
G. M. Ward
Keyword(s):  
Active Material ◽  
Coarse Particles ◽  
Kinetic Characteristics ◽  
Michaelis Constant ◽  
The Press ◽  
Biochemical Studies ◽  
Yeast Invertase ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Physiological And Biochemical

The press juice from mature seedling wheat leaves possesses a high thermo-labile activity in the inversion of sucrose. It is concluded that an invertase is present. The active material is not associated with the coarse particles of the protoplasm but is soluble in the sap and in that condition is very stable in the cold. It is, however, sensitive to drying and precipitation. Some kinetic characteristics of this enzyme resemble those of invertases from other sources. But the Michaelis constant is small by comparison with that of yeast invertase and therefore a relatively high affinity of the leaf enzyme for its substrate is indicated.

PHYSIOLOGICAL AND BIOCHEMICAL STUDIES IN PLANT METABOLISM: VIII. THE DISTRIBUTION OF INVERTASE IN THE FIRST LEAF OF KHAPLI WHEAT

1953 ◽  
Vol 31 (4) ◽  
pp. 367-382 ◽  
Author(s):  
D. W. A. Roberts
Keyword(s):  
Maximum Concentration ◽  
Vascular Tissue ◽  
Quantitative Estimation ◽  
Plant Metabolism ◽  
Phloem Parenchyma ◽  
Biochemical Studies ◽  
Wheat Leaf ◽  
Kinetics Of ◽  
Physiological And Biochemical ◽  
Leaf Juice

The kinetics of wheat leaf invertase have been investigated as a basis for its quantitative estimation. No evidence was obtained which indicated that wheat leaf invertase consists of a phosphorylase and a phosphatase. Solid preparations of the enzyme may be made by precipitating the invertase with ammonium sulphate from wheat leaf juice which has been previously freed from chlorophyll by precipitation with acetate buffer at pH 4.5. A study of the distribution of this enzyme in the first leaf of wheat shows that the enzyme reaches its maximum concentration in the leaf just at the close of the period of elongation. The enzyme is more abundant in the basal part of the leaf than the tip and this condition is taken to indicate that the enzyme is associated with the vascular tissue (phloem or phloem parenchyma) rather than the chlorenchyma.

scholarly journals Association of Pestalotiopsis Guepinii (DESM.) Stay. with Bipolaris Leaf Blight (BpLB) Infected Wheat Leaves-A new Record

2016 ◽  
Vol 40 (1) ◽  
pp. 87-90
Author(s):  
Shamim Shamsi ◽  
Mst Selina Momtaz
Keyword(s):  
New Record ◽  
Leaf Blight ◽  
Wheat Varieties ◽  
Anamorphic Fungus ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Academy Of Sciences

Pestalotiopsis guepinii (Desm.) Stay an anamorphic fungus belonging to the class Celomycetes was isolated from Bipolaris leaf blight (BpLB) infected wheat leaf of two wheat varieties namely, Balaka and Saurab during the period of February to March, 2011. Association of Pestalotiopsis guepinii with wheat is a new record.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 1, 87-90, 2016

scholarly journals DUNALIELLA ЗАМГИЙН ФИЗИОЛОГИ, БИОХИМИЙН СУДАЛГААНЫ ДҮН

2016 ◽  
pp. 60-65
Author(s):  
Б Одгэрэл ◽  
Д Цэрэндулам
Keyword(s):  
Protein Content ◽  
Beta Carotene ◽  
Cellular Morphology ◽  
Lag Phase ◽  
Extreme Conditions ◽  
Biotechnological Applications ◽  
Biochemical Studies ◽  
Dry Biomass ◽  
Protein Rich ◽  
Physiological And Biochemical

The genus Dunaliella is widely studied microalgae for its tolerance to extreme conditions, physiological aspects and many biotechnological applications, such as beta-carotene, protein, lipids and many other bioactive compounds. Physiological and biochemical studies are essential to fully explore the properties and possibilities of new isolates of Dunaliella.The aim of this study was to describe cellular morphology, growth rate and protein content of three Dunaliella strains, isolated from salty lakes in Mongolia. The cellular morphology, growth rates, protein contents were studied using microscopic analyses, Neubauer’s chamber, and micro kjeldahl method.Results showed that growths of all three Dunaliella cultures were progressed through lag phase at 3rd day. The growth of Dunaliella D-1 reached its peak on day 6, while Dunaliella D-6 and D-7 reached their stationary phase on day 7. Furthermore, the protein contents of dry biomass in Dunaliella D-1, D-6 and D-7 cultures were 62.2%, 36.1% and 38.15%, respectively. The highest protein content was found in Dunaliella D-1 culture, hence this culture could be used as protein rich supplement in further study.

Increased Lipoxygenase Activity is Involved in the Hypersensitive Response of Wheat Leaf Cells Infected with A virulent Rust Fungi or Treated with Fungal Elicitor

1986 ◽  
Vol 41 (5-6) ◽  
pp. 559-563 ◽  
Author(s):  
Carlos A. Ocampo ◽  
Bruno Moerschbacher ◽  
Hans J. Grambow
Keyword(s):  
Hypersensitive Response ◽  
Hypersensitive Reaction ◽  
Rust Fungi ◽  
Lipoxygenase Activity ◽  
Puccinia Graminis ◽  
Compatible Interaction ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Germ Tubes ◽  
Wheat Rust

The hypersensitive reaction in incompatible wheat-rust interactions is characterized by an increase in lipoxygenase activity detectable as early as 28 h after penetration of the pathogen. In contrast, lipoxygenase activity in the compatible interaction did not increase until the onset of sporulation.Lipoxygenase activity also increased following treatment of wheat leaves with an elicitor fraction from germ tubes of Puccinia graminis tritici.

scholarly journals Analysis of Draft Genome Sequences of Two New Pantoea Strains Associated with Wheat Leaf Necrotic Tissues Caused by Xanthomonas translucens Reveals Distinct Species

2020 ◽  
Vol 9 (30) ◽  
Author(s):  
Alexandre Malette ◽  
Renlin Xu ◽  
Suzanne Gerdis ◽  
Sylvia I. Chi ◽  
Greg C. Daniels ◽  
...  
Keyword(s):  
Draft Genome ◽  
Distinct Species ◽  
Whole Genome ◽  
Genome Sequences ◽  
Coding Sequences ◽  
Content Type ◽  
Wheat Leaf ◽  
Xanthomonas Translucens ◽  
Wheat Leaves

ABSTRACT We report whole-genome sequences of two new Pantoea strains (DOAB1048 and DOAB1050) isolated from necrotic wheat leaves caused by Xanthomonas translucens. The draft genome sequences of DOAB1048 and DOAB1050 consist of 52 and 57 scaffolds and have sizes of 4,795,525 bp and 4,962,883 bp with 4,418 and 4,517 coding sequences, respectively.

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