Knockout of the VPS22 component of the ESCRT-II complex in rice (Oryza sativa L.) causes chalky endosperm and early seedling lethality

2012 ◽  
Vol 40 (5) ◽  
pp. 3475-3481 ◽  
Author(s):  
Xiang-Qian Zhang ◽  
Pei Hou ◽  
Hai-Tao Zhu ◽  
Guo-Dong Li ◽  
Xin-Guo Liu ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Early Seedling ◽  
Seedling Lethality

scholarly journals Evaluation of Rice (Oryza sativa L.) Genotypes for Drought Tolerance at Germination and Early Seedling Stage

2018 ◽  
Vol 16 (1) ◽  
pp. 44-54 ◽  
Author(s):  
M M Islam ◽  
E Kayesh ◽  
E Zaman ◽  
T A Urmi ◽  
M M Haque
Keyword(s):  
Oryza Sativa ◽  
Water Stress ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Evaluation System ◽  
Oryza Sativa L ◽  
Dry Weight ◽  
Seedling Height ◽  
Early Seedling ◽  
Rice Genotypes

Drought stress is a major constraint to the production and yield stability of crops. Rice (Oryza sativa L.) is considered as a drought-sensitive crop species. Within this species, there are considerable varietal differences in sensitivity to this environmental stress. An experiment was conducted at the laboratory of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during April to September 2016 to evaluate 100 rice genotypes for drought tolerance during germination and early seedling growth stage. The genotypes were tested against five levels of drought stress imposed by Polyethylene glycol 6000 (PEG-6000) @ 0, 5, 10, 15 and 20%. The experiment was laid out in a complete randomized design with four replications. The results showed that with increasing water stress, germination in all the genotypes decreased from 95.8% in control to 6.6 % in highest stress (20% PEG) level. Seedling height and dry weight also decreased in all rice genotypes with the increase in water stress level. Based on Standard Evaluation System (SES),18 genotypes were selected primarily. Among the 18 genotypes, Ratoil and Chinisakkar showed higher germination index, relative seedling height and relative seedling dry weight than the check drought tolerant BRRI dhan43 at 20% PEG. Beside these, performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43. The genotypes Ratoil, Chinisakkar, Kumridhan, Pusur and Somondori showed the best performance under drought condition. The Agriculturists 2018; 16(1) 44-54

scholarly journals Mass screening for salinity tolerance in rice (Oryza sativa. L) genotypes at early seedling stage by hydroponics

2019 ◽  
Vol 10 (1) ◽  
pp. 137 ◽  
Author(s):  
M. Amaravel ◽  
S. Merina Prem Kumari ◽  
M. Arumugam Pillai ◽  
S. Saravanan ◽  
M. L. Mini ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Mass Screening ◽  
Salinity Tolerance ◽  
Oryza Sativa L ◽  
Seedling Stage ◽  
Early Seedling

scholarly journals Effect of salt stress on germination and early seedling growth of rice (Oryza sativa L.)

2010 ◽  
Vol 9 (13) ◽  
pp. 1911-1918 ◽  
Author(s):  
A Hakim M ◽  
S Juraimi A ◽  
Begum M ◽  
M Hanafi M ◽  
R Ismail Mohd ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Salt Stress ◽  
Seedling Growth ◽  
Oryza Sativa L ◽  
Early Seedling Growth ◽  
Early Seedling

scholarly journals Germination and seedling growth of rice (Oryza sativa L.) as affected by varying concentrations of loom-dye effluent

2019 ◽  
Vol 17 (2) ◽  
pp. 153-160 ◽  
Author(s):  
Md. Arifur Rahman ◽  
Md. Sohanur Rahman ◽  
K.M. Mohiuddin ◽  
Md. Akhter Hossain Chowdhury ◽  
Md. Abul Khair Chowdhury
Keyword(s):  
Oryza Sativa ◽  
Seed Germination ◽  
Seedling Growth ◽  
Oryza Sativa L ◽  
Industrial Effluent ◽  
Rice Seed ◽  
Early Seedling Growth ◽  
Significant Difference ◽  
Early Seedling ◽  
Radical Length

Indiscriminate discharge of industrial effluent has become a serious problem for the agro-ecological environment in most of the areas of Bangladesh. The effects of loom-dye effluents on seed germination and early seedling growth of rice (Oryza sativa L.) were investigated by conducting an experiment in the laboratory of the Department of Agricultural Chemistry of Bangladesh Agricultural University, Mymensingh. Three types of loom-dye effluents were applied in sterilized petridishes at different loading ratios. Seven treatments (i.e., T0, T1, T2, T3, T4, T5 and T6 with 0, 5, 10, 25, 50, 75 and 100% effluent, respectively) of each effluent were used following completely randomized design (CRD) and replicated three times. Subsequently, Pb, Fe, Zn, Mn and Cr accumulation were also investigated in the harvested rice seedlings. Rice seed showed a significant difference in germination percentage with varying levels of effluent application at different days after setting of germination. The decreased seed germination rate and seedling growth of rice were observed with increased concentration of loom-dye effluents. The highest germination speed (97.8%) was obtained from control whereas the lowest germination speeds were obtained from T5 of black, and T6 of both black and violet effluents. Phytotoxic effects of loom-dye effluents on germination and radical length were extreme at 100% effluent concentration having the order of black > violet > pink. The maximum radical length (6.4 cm) and plumule length (7.5 cm) were observed with T1 of pink dye effluent whereas the minimum length of radical and plumule were obtained from T6 treatment of the effluents. The highest fresh weight (39.8 mg petridish–1), dry weight (5.7 mg petridish–1) and seedling vigor index (746.7%) were also observed from T1 of pink dye effluent. The maximum uptake of Pb, Fe, Mn and Zn was 0.48, 3.81, 0.79 and 0.13 μg g−1, respectively. The uptake of Cr was below the detectable limit. Total heavy metal accumulation in rice was in the following order: Fe>Mn>Pb>Zn>Cr. Results showed that the higher concentration of loom-dye effluent showed the higher toxic effects on different parameters of germination and early seedling growth compared with the lower effluent concentrations. J. Bangladesh Agril. Univ. 17(2): 153–160, June 2019

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