On the role of β-cyanoalanine synthase (CAS) in metabolism of free cyanide and ferri-cyanide by rice seedlings

Ecotoxicology ◽  
2011 ◽  
Vol 21 (2) ◽  
pp. 548-556 ◽  
Author(s):  
Xiao-Zhang Yu ◽  
Peng-Cheng Lu ◽  
Zhen Yu
Keyword(s):  
Free Cyanide ◽  
Rice Seedlings ◽  
Cyanoalanine Synthase

Role of nano-biochar in attenuating the allelopathic effect from Imperata cylindrica on rice seedlings

2020 ◽  
Vol 7 (1) ◽  
pp. 116-126 ◽  
Author(s):  
Yu Shen ◽  
Haiyan Tang ◽  
Wenhao Wu ◽  
Heping Shang ◽  
Di Zhang ◽  
...  
Keyword(s):  
Native Species ◽  
Chlorophyll Concentration ◽  
Rice Seedling ◽  
Imperata Cylindrica ◽  
Allelopathic Effect ◽  
Rice Seedlings ◽  
Negative Effects ◽  
Gene Expressions ◽  
Stress Gene

This study applies nano-BC to protect the native species, and reduce the negative effects of rice seedling growth and chlorophyll concentration, as well as oxidative stress, lipid peroxidation and stress gene expressions from invasive species.

The role of exogenous proline in amelioration of lipid peroxidation in rice seedlings exposed to Cr(VI)

2017 ◽  
Vol 123 ◽  
pp. 106-112 ◽  
Author(s):  
Xiao-Zhang Yu ◽  
Yu-Juan Lin ◽  
Wei-Jia Fan ◽  
Ming-Rui Lu
Keyword(s):  
Lipid Peroxidation ◽  
Rice Seedlings ◽  
Exogenous Proline

scholarly journals Stimulating and toxic effects of copper and cobalt nanopowders on rice seedlings

2020 ◽  
pp. 42-52
Author(s):  
I. V. Obidina ◽  
G. I. Churilov ◽  
S. D. Polischuk ◽  
A. Yu. Tarara ◽  
S. S. Gomozova ◽  
...  
Keyword(s):  
Chemical Nature ◽  
Microscopic Analysis ◽  
Rice Seedlings ◽  
Electron Microscopic ◽  
Regional Center ◽  
Scientific Equipment ◽  
Wide Range ◽  
Object Of Study ◽  
Positive Effect

Metal nanopowders have a stimulating effect on the growth and development of plants. The biological activity of nanoparticles depends on size, concentration, and chemical composition. Nanoparticles require further study because they have a wide range of applications in medicine and agriculture. Being biocompatible, copper and cobalt can play the role of growth stimulant, are not toxic and can be used for contact with living systems. The object of study was rice, as an economically important culture. The study addressed the effect of cobalt and copper nanoparticles on the germination and development of rice seedlings. The optimal concentration of ultrafine solutions of these nanopowders for pre-sowing treatment of seeds was determined. Although copper and cobalt have different chemical nature, the nanoparticles show similar impact and doze-dependent effect. Minimum concentrations of the nanoparticles had a positive effect on the morphological and biometric indicators of sprouts. The activity of oxidase enzymes was measured and it showed a reversible nature of oxidative stress. An increase in superoxide dismutase activity and a decrease in catalase activity by less than 30% indicates the stress resistance of rice sprouts and the absence of phytotoxic effects of the nanopowders. The presence of these metals in the seedling homogenate was determined to define the toxic effect. The electron microscopic analysis of the partition of metals in the tissues of experimental plants did not reveal significant deviations from control values. The experiments were performed using scientific equipment of Regional Center for Collective Use of Probe Microscopy in Ryazan State Radio Engineering University.

scholarly journals Comparative study on the influence of silicon and selenium to mitigate arsenic induced stress by modulating TCA cycle, GABA and polyamine synthesis in rice seedlings

2021 ◽  
Author(s):  
Susmita Das ◽  
Barsha Majumder ◽  
Asok Kumar Biswas
Keyword(s):  
Tca Cycle ◽  
Future Application ◽  
Rice Seedlings ◽  
Respiratory Enzymes ◽  
Rice Plants ◽  
Regulatory Enzymes ◽  
Joint Application ◽  
Defensive Role ◽  
Gaba Accumulation

Abstract Arsenic contamination of groundwater is a major concern for its use as drinking water and crop irrigation in many regions of the world. Arsenic is absorbed by rice plants from arsenic contaminated water during irrigation, hampers growth and agricultural productivity. The aim of the study was to mitigate the activity of TCA cycle, synthesis of γ-aminobutyric acid (GABA) and polyamines (PAs) in rice (Oryza sativa L. cv. MTU-1010) seedlings under arsenate (As-V) stress [25 µM, 50 µM and 75 µM] by silicon (Si) [2 mM] and selenium (Se) [5 µM] amendments, and to investigate which chemical was more potential to combat this threat. As(V) application decreased the activities of tested respiratory enzymes while the levels of organic acids (OAs) were increased in the test seedlings. Co-application of Si and As(V) increased the activities of respiratory enzymes, consequently further increased accumulation of OAs that were more than Se with As(V) application in the test seedlings. GABA accumulation along with the activities of its regulatory enzymes were enhanced under As(V) stress. During joint application of Si and As(V) and Se and As(V) said parameters were decreased showing defensive role of these chemicals to resist As(V) toxicity in rice but amendment of Si was more potential than Se amendment resulted reduction of stress induced damage in the test seedlings. PAs trigger tolerance mechanism against stress in plants. PAs viz., Putrescine, spermidine and spermine were synthesized more during Si and Se amendments in As(V) contaminated rice seedlings to combat the effect of stress. Si amendment substantially modulated the toxic effects caused by As(V) over Se amendment in As(V) challenged test seedlings. Thus in future application Si enriched fertilizer will be beneficial than application of Se enriched fertilizer to grow rice plants with normal vigor in arsenic contaminated soil.

scholarly journals Role of chitosan powder on the production of quality rice seedlings of BRRI dhan29

2017 ◽  
Vol 4 (3) ◽  
pp. 141-149
Author(s):  
Mohammad Issak ◽  
Amena Sultana
Keyword(s):  
Organic Matter ◽  
Chemical Properties ◽  
Maximum Level ◽  
Dependent Manner ◽  
Rice Seedlings ◽  
Minimum Level ◽  
Dose Dependent ◽  
Boro Rice ◽  
Chitosan Powder

Role of chitosan powder on the production of quality rice seedlings of BRRI dhan29 was examined in the field of Sher-e-Bangla Agricultural University, Dhaka. There were six treatments and three replications in the experiment. The treatments were as follows: T1 = 100 g chitosan (CHT) powder/m2, T2 = 200 g CHT powder/m2, T3 = 300 g CHT powder/m2, T4 = 400 g CHT powder/m2, T5 = 500 g CHT powder/m2, T6 = 0 g CHT powder/m2. A significant variation was observed in the seedlings height, biomass production, dry matter production and chemical properties of the seedbed soils due to the application of chitosan powder in the seedbed. The maximum seedlings height, fresh weight, oven dry weight was observed in the treatment T4 and the minimum level in the treatment T6 (control). On the other hand, the maximum level of organic carbon, organic matter and soil pH was recorded in the treatment T5 and the minimum level in the treatment T6 (control). Chitosan powder increased the level of organic matter in a dose dependent manner. Quality of the Boro rice seedlings were improved due to the application of chitosan powder and the seedlings strength were increased in a dose dependent manner. All the treatments were produced good quality Boro rice seedlings having more chlorophyll level and seedlings strength than the control treatments. Our results indicated that treatment T4 shows the superior results than other treatments. These results could be due some nature of soil alkalization and other some macro-micro nutritional supplementation which may be improving the strength of the seedlings. Taken together, chitosan powder could play a significant role in the quality Boro rice seedling production that might be help to increase the grain yield.Res. Agric., Livest. Fish.4(3): 141-149, December 2017

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