Pollution effects of fertilizer factory effluent on growth and development of corn and rice seedlings

1987 ◽  
Vol 10 (1) ◽  
pp. 27-35 ◽  
Author(s):  
L.C. Mishra ◽  
K.K. Singh
Keyword(s):  
Growth And Development ◽  
Rice Seedlings ◽  
Pollution Effects

scholarly journals Modulation of ascorbate-glutathione cycle by selenate and sulphate treatments in the seedlings of two rice (Oryza sativa L.) cultivars

2020 ◽  
Vol 7 (3) ◽  
Author(s):  
Debarati Das ◽  
Paulin Seal ◽  
Sabarni Biswas ◽  
Asok K Biswas
Keyword(s):  
Oryza Sativa ◽  
Growth And Development ◽  
Elevated Level ◽  
Oryza Sativa L ◽  
Ascorbate Oxidase ◽  
Rice Cultivars ◽  
Rice Seedlings ◽  
Thiol Metabolism ◽  
Regulatory Enzymes ◽  
Glutathione Cycle

The trace element Selenium (Se) has a dual role in the growth and metabolism of plants. Low concentration of selenium (2 ?M selenate) promotes growth and counteracts the detrimental effects of abiotic stress as opposed to higher levels (?10 ?M) where it acts as a pro-oxidant. We focused on both individual and interactive influence of selenate and sulphate on thiol metabolism in seedlings of rice cultivars, satabdi and khitish. Inhibition of ascorbate contents by about 17% on an average, in the test seedlings treated with Se correlated with increased activities of ascorbate peroxidase and ascorbate oxidase in the cultivars. The glutathione levels also increased significantly, on an average by about 102% in roots and 74% in shoots of cv. satabdi compared to a rise, by about 49% in roots and 56% in shoots of cv. khitish. The elevated level of glutathione coincided with the stimulatory influence of Se on its regulatory enzymes. Concomitantly the levels of ?-tocopherol and phytochelatins were also induced in both the test cultivars. Increase in ?-tocopherol activity reached a maximum by about 47% in roots and 80% in shoots of cv. satabdi whereas it increased by about 36% in roots and about 64% in shoots of cv. khitish. Substantive increase in the levels of PC4 followed by PC2 and PC3 was also noted. The effects were found to be less conspicuous in shoots than in roots. Rice seedlings exposed to combined Se and 10mM sulphate treatments showed improved growth and development as a result of better thiol metabolism due to amelioration of the adverse effects caused by selenium alone on all the parameters tested.

Rhizobium plasmids are involved in the inhibition or stimulation of rice growth and development

2001 ◽  
Vol 28 (9) ◽  
pp. 923 ◽  
Author(s):  
Francine M. Perrine ◽  
Joko Prayitno ◽  
Jeremy J. Weinman ◽  
Frank B. Dazzo ◽  
Barry G. Rolfe
Keyword(s):  
Growth And Development ◽  
Rhizobium Leguminosarum ◽  
Rice Seedling ◽  
Growth Responses ◽  
Rice Seedlings ◽  
Rice Growth ◽  
Ti Plasmids ◽  
Rhizobium Strains ◽  
Seedling Roots ◽  
Stimulation Of

This paper originates from an address at the 8th International Symposium on Nitrogen Fixation with Non-Legumes, Sydney, NSW, December 2000 We examined growth responses of rice seedlings (Oryza sativaL. cv. Pelde) to specific Rhizobium strains and their mutants, to investigate the molecular basis of colonization and the stimulation or inhibition of rice growth and development by rhizobia. Inoculation experiments with rice seedlings showed that specific Rhizobium isolates of these rice-associated and legume-associated rhizobia could either promote, inhibit, or have no influence on rice plant growth. There are genes on certain plasmids of Rhizobium leguminosarum bv. trifolii and R. leguminosarum bv. viciae that affect the growth and development of rice root morphology. Additionally, we found that bacteria can intimately associate with, and enter into, rice seedling roots by alternative mechanisms to those encoded by the symbiotic (pSym) and the tumour-inducing (Ti) plasmids. Investigations suggest an involvement of the phytohormone auxin, and possibly nitrate, in this complex rice–Rhizobium interaction.

NaCl Alters Contents of Nucleic Acids, Protein, Polyamines and the Activity of Agmatine Deiminase During Germination and Seedling Growth of Rice (Oryza sativa L.)

1988 ◽  
Vol 15 (6) ◽  
pp. 769 ◽  
Author(s):  
L Prakash ◽  
M Dutt ◽  
G Prathapasenan
Keyword(s):  
Oryza Sativa ◽  
Nucleic Acids ◽  
Seedling Growth ◽  
Growth And Development ◽  
Oryza Sativa L ◽  
Biochemical Changes ◽  
Embryo Axis ◽  
Rice Seedlings ◽  
Nacl Salinity ◽  
Agmatine Deiminase

The decrease in growth of rice caused by NaCl salinity is accompanied by a decrease in the contents of DNA, RNA and protein in the embryo axis. As was in the case of seedling growth the levels of polyamines (putrescine, spermidine and spermine) and the activity of agmatine deiminase (EC 3.5.3.12), an enzyme involved in the biosynthesis of polyamines, in endosperm and embryo axis also were markedly lowered by salt. These biochemical changes induced by NaCl are discussed with respect to growth and development of rice seedlings.

An ultrastructural study of vegetative incompatibility in plants

1978 ◽  
Vol 36 (2) ◽  
pp. 436-437
Author(s):  
Randy Moore
Keyword(s):  
Ultrastructural Study ◽  
Cell Walls ◽  
Growth And Development ◽  
Solanum Pennellii ◽  
Initial Product ◽  
Basic Aspect ◽  
Tissue Interactions ◽  
Graft Interface ◽  
Antigen Antibody ◽  
Standard Fixation

Cell and tissue interactions are a basic aspect of eukaryotic growth and development. While cell-to-cell interactions involving recognition and incompatibility have been studied extensively in animals, there is no known antigen-antibody reaction in plants and the recognition mechanisms operating in plant grafts have been virtually neglected.An ultrastructural study of the Sedum telephoides/Solanum pennellii graft was undertaken to define possible mechanisms of plant graft incompatibility. Grafts were surgically dissected from greenhouse grown plants at various times over 1-4 weeks and prepared for EM employing variations in the standard fixation and embedding procedure. Stock and scion adhere within 6 days after grafting. Following progressive cell senescence in both Sedum and Solanum, the graft interface appears as a band of 8-11 crushed cells after 2 weeks (Fig. 1, I). Trapped between the buckled cell walls are densely staining cytoplasmic remnants and residual starch grains, an initial product of wound reactions in plants.

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