The Effect of NaCl on Growth and Xylem Differentiation of Radish Seedlings

A. Scialabba; M. R. Melati

doi:10.1086/337852

The tonoplast H+pyrophosphatase of radish seedlings: biochemical characteristics

Physiologia Plantarum ◽

10.1034/j.1399-3054.1991.830302.x ◽

1991 ◽

Vol 83 (3) ◽

pp. 339-345 ◽

Cited By ~ 1

Author(s):

Maria Chiara Pugliarello ◽

Franca Rasi-Caldogno ◽

Maria Ida De Michelis ◽

Claudio Olivari

Keyword(s):

Biochemical Characteristics ◽

Radish Seedlings

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Effect of Exogenously Applied 24-Epibrassinolide and Brassinazole on Xylogenesis and Microdistribution of Cell Wall Polymers in Leucaena leucocephala (Lam) De Wit

Journal of Plant Growth Regulation ◽

10.1007/s00344-021-10313-6 ◽

2021 ◽

Author(s):

S. Pramod ◽

M. Anju ◽

H. Rajesh ◽

A. Thulaseedharan ◽

Karumanchi S. Rao

Keyword(s):

Electron Microscopy ◽

Cell Wall ◽

Leucaena Leucocephala ◽

Higher Plants ◽

Lignin Content ◽

Wood Quality ◽

Wall Structure ◽

Vessel Element ◽

Xylem Differentiation ◽

Cell Wall Polymers

AbstractPlant growth regulators play a key role in cell wall structure and chemistry of woody plants. Understanding of these regulatory signals is important in advanced research on wood quality improvement in trees. The present study is aimed to investigate the influence of exogenous application of 24-epibrassinolide (EBR) and brassinosteroid inhibitor, brassinazole (BRZ) on wood formation and spatial distribution of cell wall polymers in the xylem tissue of Leucaena leucocephala using light and immuno electron microscopy methods. Brassinazole caused a decrease in cambial activity, xylem differentiation, length and width of fibres, vessel element width and radial extent of xylem suggesting brassinosteroid inhibition has a concomitant impact on cell elongation, expansion and secondary wall deposition. Histochemical studies of 24-epibrassinolide treated plants showed an increase in syringyl lignin content in the xylem cell walls. Fluorescence microscopy and transmission electron microscopy studies revealed the inhomogenous pattern of lignin distribution in the cell corners and middle lamellae region of BRZ treated plants. Immunolocalization studies using LM10 and LM 11 antibodies have shown a drastic change in the micro-distribution pattern of less substituted and highly substituted xylans in the xylem fibres of plants treated with EBR and BRZ. In conclusion, present study demonstrates an important role of brassinosteroid in plant development through regulating xylogenesis and cell wall chemistry in higher plants.

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Special senescence stages in chloroplast ultrastructure of radish seedlings induced by the photosystem II-herbicide bentazon

PROTOPLASMA ◽

10.1007/bf01281540 ◽

1982 ◽

Vol 110 (2) ◽

pp. 138-142 ◽

Cited By ~ 4

Author(s):

D. Meier ◽

H. K. Lichtenthaler

Keyword(s):

Photosystem Ii ◽

Chloroplast Ultrastructure ◽

Radish Seedlings

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Uptake and translocation of some pesticides by hypocotyls of radish seedlings

Weed Research ◽

10.1111/j.1365-3180.1976.tb00407.x ◽

1976 ◽

Vol 16 (4) ◽

pp. 229-238 ◽

Cited By ~ 5

Author(s):

M. G. T. SHONE ◽

ANN V. WOOD

Keyword(s):

Radish Seedlings

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Biocontrol of seed-borne Alternaria raphani and A. brassicicola

Canadian Journal of Microbiology ◽

10.1139/m87-149 ◽

1987 ◽

Vol 33 (10) ◽

pp. 850-856 ◽

Cited By ~ 27

Author(s):

G. Vannacci ◽

G. E. Harman

Keyword(s):

Biological Control ◽

Host Range ◽

Trichoderma Harzianum ◽

Pythium Species ◽

Biological Control Agents ◽

Fusarium Sp ◽

Chamber Studies ◽

Growth Chamber Studies ◽

Radish Seedlings

Forty-two microorganisms were tested as biological control agents against Alternaria raphani and A. brassicicola. Tests were conducted for in vitro antagonistic ability, for ability to control the pathogens on naturally infected seeds germinated on moistened blotters, and in planting mix in growth chamber studies, and for their ability to reduce pod infection. The organisms tested were obtained from cruciferous seeds or were strains already identified as being effective against soil-borne Pythium species. The blotter test indicated that six organisms increased both the number of healthy seedlings and the number of seedlings produced from A. raphani infected radish seeds. An additional seven strains improved either germination or increased the number of healthy seedlings. Twenty-nine organisms increased the number of healthy cabbage seedlings from A. brassicicola infected seeds, but total germination was not modified by any treatment. Experiments in planting mix showed that five antagonists (Chaetomium globosum, two strains of Trichoderma harzianum, T. koningii, and Fusarium sp.) increased the number of healthy plants in both radish samples tested, while four additional antagonists provided a significant increase in only one of the samples tested. The five antagonists that consistently increased numbers of healthy radish seedlings also decreased pod infection by A. raphani. None were as effective as iprodrone, however. Several effective antagonists were found to be mycoparasitic against Alternaria spp. Some strains of Trichoderma previously found to be effective against Pythium spp. were also effective against Alternaria spp., indicating that these strains have a wide host range.

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