silicon has been researched along with malic-acid* in 2 studies
2 other study(ies) available for silicon and malic-acid
| Article | Year |
|---|---|
Exogenous silicon alters organic acid production and enzymatic activity of TCA cycle in two NaCl stressed indica rice cultivars.
The activities of TCA cycle enzymes viz., pyruvate dehydrogenase, citrate synthase, isocitrate dehydrogenase, succinate dehydrogenase and malate dehydrogenase as well as levels of different organic acids viz., pyruvic acid, citric acid, succinic acid and malic acid were studied in two rice cultivars viz. cv. Nonabokra and cv. MTU 1010 differing in salt tolerance grown under 25, 50 and 100 mM NaCl salinity levels. A contrasting response to salt stress on enzyme activities of TCA cycle and accumulation of organic acid was observed between two cultivars during twenty-one days period of study. Salinity caused enhanced organic acid production and increase in all five enzyme activities in cv. Nonabokra whereas in cv. MTU 1010 decrease in both organic acid production and enzymes activities were noted. Joint application of exogenous silicon along with NaCl, altered the organic acids levels and activities of enzymes in both cultivars of rice seedlings conferring tolerance against salt induced stress. Rice cv. MTU 1010 showed better response to exogenous silicon on parameters tested compared to cv. Nonabokra. Topics: Chlorides; Citrate (si)-Synthase; Citric Acid; Citric Acid Cycle; Isocitrate Dehydrogenase; Malate Dehydrogenase; Malates; Membrane Potential, Mitochondrial; Microscopy, Confocal; Oryza; Potassium; Pyruvate Dehydrogenase Complex; Pyruvic Acid; Salt Stress; Silicon; Sodium; Succinate Dehydrogenase; Succinic Acid | 2019 |
Total synthesis of (+)-brasilenyne. Application of an intramolecular silicon-assisted cross-coupling reaction.
The first enantioselective total synthesis of (+)-brasilenyne (1) has been achieved in 19 linear steps, with 5.1% overall yield from l-(S)-malic acid. The construction of the oxonin core containing a 1,3-cis,cis diene unit was accomplished with a tandem ring-closing metathesis/silicon-assisted intramolecular cross-coupling reaction. In addition, a key propargylic stereogenic center was created through a novel, highly diastereoselective ring opening of a 1,3-dioxolanone promoted by TiCl(4). This reaction proceeded through an oxocarbenium ion intermediate and the asymmetric induction was fully controlled by l-malic acid residue. The C(8) stereogenic center was set by a reagent-controlled asymmetric allylboration. Topics: Alkynes; Cobalt; Crystallography, X-Ray; Dioxolanes; Ethers; Ethers, Cyclic; Malates; Organometallic Compounds; Silicon; Stereoisomerism | 2004 |