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Interaction between photoreceptors and BR signaling in Arabidopsis

100%

Zhu Z. X. , Zhu X. F. , Zhu Y. T. , Yao D. N. , Xuan Y. H.

nr 2

Degradation of xyloglucan and pectic polysaccharides during cell elongation in Phaseolus vulgaris hypocotyls

100%

Chanda S. V. , Bapodara C. , Singh Y. D.

Acta Physiologiae Plantarum

1995

tom 17

nr 4

Changes in peroxidase and IAA oxidase activities during cell elongation in Phaseolus hypocotyls

100%

Bagatharia S. B. , Chanda S. V.

tom 20

nr 1

Cytoplasmic and salt-extracted peroxidase and IAA oxidase activities were studied in Phaseolus vulgaris hypocotyls treated with gibberellic acid (GA, 200 µM), naphthyl acetic acid (NAA, 100 µM) and distilled water control (DW). Peroxidase activity was assayed with four hydrogen donors during the initial phase of hypocotyl elongation. Though peroxidase activity showed a decreasing trend with time in all the hydrogen donors studied; considerable variation with different hydrogen donors was observed. NAA had maximum peroxidase activity as compared to DW or GA treatment. The activity showed a clear inverse correlation with hypocotyl growth. IAA oxidase activity showed a similar trend with growth as peroxidase activity. A highly significant correlation was observed between peroxidase and IAA oxidase activities and high molecular weight xyloglucan content (P<0.001). Finally, the possible role of peroxidase and IAA oxidase activities in hypocotyl elongation growth is discussed.

Effect of salinity stress on growth, peroxidase and IAA oxidase activities in vigna seedlings

100%

Pujari D. S. , Chanda S. V.

tom 24

nr 4

Modification of cell wall polysaccharides during cell elongation in Phaseolus vulgaris hypocotyls

84%

Bagatharia S. B. , Chanda S. V.

tom 20

nr 1

The effect of gibberellic acid (GA) and naphthylacetic acid (NAA) on hypocotyl elongation and cell wall polysaccharides was studied using Phaseolus vulgaris seedlings grown in light condition. The hypocotyl was demarcated into two segments — one near the root was called lower and the one near the cotyledon was called upper. The upper segment showed a typical sigmoidal growth curve while lower segment did not show any growth at all. GA promoted the growth of upper segment while NAA showed clear inhibition in both the segments. Xyloglucan content showed a clear inverse correlation with growth. Pectic polysaccharides did not show a clear trend, though showed an initial inverse correlation with growth. It is concluded that degradation of low and high molecular weight xyloglucans are involved in cell wall loosening which in turn may be responsible for the elongation growth of Phaseolus hypocotyls in light.