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Role of peroxidases and glycosidases in regulation of sink size in developing seeds of Hibiscus esculentum

100%

Thaker V. S.

Acta Physiologiae Plantarum

1998

tom 20

nr 2

Changes in peroxidases and glycosidases activities in cytoplasmic and ionically wall-bound fraction of developing seed of Hibiscus esculentum were studied. In both fractions, the activity of peroxiases assayed with ferulic acid and caffeic acid as a hydrogen donors, showed inverse correlation with the cell enlargement (sink size development phase). Activities of glycosidases, on the other hand, showed positive correlation with the sink development and sink filling period of the developing seed. The role of both the enzymes, glycosidases and peoxidase in seed development is discussed.

Changes in water content, sugars and invertase activity in developing seeds of Hibiscus esculentum

100%

Thaker V.

Acta Physiologiae Plantarum

1999

tom 21

nr 2

Seeds of Hibiscus esculentum were analyzed for growth, in terms of fresh and dry weights, cell size, water content, reducing and non-reducing sugars and acid invertase activity. On the basis of growth analysis seed development is divided into four distinct phases of a) cell division, d) cell elongation, c) dry matter accumulation and, d) maturation. A close parallel with water content and cell size was observed. A peak level of reducing sugars was observed during the rapid elongation growth. The role of invertase in hydrolyzing sugars and its regulation of sink development is discussed.

Ograniczanie wyników

2 Acta Physiologiae Plantarum

1 Thaker V.

1 Thaker V. S.

1 1999

1 1998

Wyniki wyszukiwania

Role of peroxidases and glycosidases in regulation of sink size in developing seeds of Hibiscus esculentum

Changes in water content, sugars and invertase activity in developing seeds of Hibiscus esculentum