scholarly journals Regulation of Growth and Carbohydrate Metabolism in Rice (Oryza Sativa L.) seedlings by Selenium and Sulphate

2018 ◽  
Vol 7 (1) ◽  
pp. 61 ◽  
Author(s):  
Debarati Das ◽  
Prabal Das ◽  
Asok K Biswas
Keyword(s):  
Oryza Sativa ◽  
Carbohydrate Metabolism ◽  
Oryza Sativa L ◽  
Sucrose Phosphate Synthase ◽  
Sodium Sulphate ◽  
Rice Seedlings ◽  
Starch Phosphorylase ◽  
Metabolizing Enzymes ◽  
Simultaneous Application ◽  
Linear Pattern

Selenium is an essential and also toxic trace element for organisms including plants. We studied the role of selenium (Na2SeO4) on growth and carbohydrate metabolism and its interaction with sulphate (Na2SO4) in rice (Oryza sativa L. cv. Satabdi) seedlings. Low concentration of selenium (2µM) showed stimulatory effect on growth as opposed to its higher concentration (50µM). Selenium was found to accumulate in a dose dependent linear pattern in the plant tissues. Exposure to selenate increased both reducing and non reducing sugar contents in the rice seedlings accompanied with an increase in the activities of sugar metabolizing enzymes like Sucrose Synthase (EC 2.4.1.13) and Sucrose Phosphate Synthase (EC 2.4.1.14). An increase in Starch Phosphorylase (EC 2.4.1.1) activity corresponded with the reduction in starch contents in the rice seedlings. Since Selenium is chemically analogous to sulphate, simultaneous application of sodium sulphate (10mM) and selenate (Na2SeO4) was found to ameliorate partially or totally all the tested parameters under selenate treatment alone resulting in alteration of growth and development of the test seedlings.

QTLs for nutritional contents of rice seedlings (Oryza sativa L.) in solution cultures and its implication to tolerance to iron-toxicity

2005 ◽  
Vol 275 (1-2) ◽  
pp. 57-66 ◽  
Author(s):  
Akifumi Shimizu ◽  
Corinta Q. Guerta ◽  
Glenn B. Gregorio ◽  
Shinji Kawasaki ◽  
Hiroshi Ikehashi
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Iron Toxicity ◽  
Rice Seedlings ◽  
Solution Cultures

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.

Proline and carbohydrate metabolism in rice varieties (Oryza sativa L.) under various drought and recovery conditions

2019 ◽  
Vol 24 (3) ◽  
pp. 376-387 ◽  
Author(s):  
Doan Cong Dien ◽  
Thieu Thi Phong Thu ◽  
Kyi Moe ◽  
Takeo Yamakawa
Keyword(s):  
Oryza Sativa ◽  
Carbohydrate Metabolism ◽  
Oryza Sativa L ◽  
Rice Varieties

scholarly journals Interaction between cadmium and atrazine during uptake by rice seedlings (Oryza sativa L.)

Chemosphere ◽  
2005 ◽  
Vol 60 (6) ◽  
pp. 802-809 ◽  
Author(s):  
Yu-Hong Su ◽  
Yong-Guan Zhu ◽  
Ai-Jun Lin ◽  
Xu-Hong Zhang
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Rice Seedlings

scholarly journals Environmental Parameters Affecting Dark Response of Rice Seedlings (Oryza sativa L.) to Triacontanol

1978 ◽  
Vol 61 (5) ◽  
pp. 851-854 ◽  
Author(s):  
H. C. Bittenbender ◽  
David R. Dilley ◽  
Violet Wert ◽  
Stanley K. Ries
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Environmental Parameters ◽  
Rice Seedlings

Partial Proteolysis of Rice Phytochrome: Comparison with Oat Phytochrome

1989 ◽  
Vol 44 (9-10) ◽  
pp. 757-764 ◽  
Author(s):  
Rudolf Schendel ◽  
Zhe Tong ◽  
Wolfhart Rüdiger
Keyword(s):  
Signal Transduction ◽  
Oryza Sativa ◽  
Amino Acid ◽  
Spectral Data ◽  
Active Center ◽  
Oryza Sativa L ◽  
Slight Modification ◽  
Amino Acid Sequences ◽  
Rice Seedlings ◽  
Conserved Sequence

Phytochrome was isolated from etiolated rice seedlings (Oryza sativa L.) by slight modification of the procedure for oat phytochrome. Spectral data of rice phytochrome are comparable with those of oat and rye phytochrome. Controlled proteolysis with endoproteinases Lys-C and Glu-C yielded defined fragments some of which were different for Pr and Pfr. The fragments were identified by comparison with the corresponding fragments of oat phytochrome and by comparison of the amino acid sequences of rice and oat phytochrome. Regions of the peptide chain which are differently exposed in Pr and Pfr were identified. A highly conserved sequence around residues 740-750 is discussed as candidate for an ‘‘active center’’ of signal transduction.

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