EARLY IDENTIFICATION OF SALT TOLERANT GENOTYPES OF RICE (ORYZA SATIVA L.) USING CONTROLLED DETERIORATION

2006 ◽  
Vol 42 (1) ◽  
pp. 65-77 ◽  
Author(s):  
M. Z. ALAM ◽  
T. STUCHBURY ◽  
ROBERT E. L. NAYLOR
Keyword(s):  
Seedling Growth ◽  
Seed Quality ◽  
Oryza Sativa L ◽  
Germination Rate ◽  
Seed Vigour ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Controlled Deterioration ◽  
Rice Genotypes ◽  
Initial Seed

The response of germination and early seedling growth to levels of salinity (0, 50, 100, 150, 200 and 250 mM NaCl) were examined in single seed lots of ten modern rice genotypes. Unaged and deteriorated rice seeds were germinated in rolled paper towels and in Petri dishes. Initial seed quality, final germination, germination rate and early seedling growth were assessed. The samples of the rice genotypes differed in their initial seed quality (measured in terms of Ki). The effect of deterioration varied depending upon the initial seed quality and the severity of the treatment imposed. Ageing (using the technique of controlled deterioration, CD) for up to 24 h had no effect on final germination levels. Although CD for 30 h only reduced final germination slightly, ageing for 36 or 48 h reduced it greatly. Controlled deterioration for 36 h or longer reduced the final length and the rate of extension of both the plumule and radicle. Combining information about germination in salt solution with that about seed quality enabled a distinction to be made between varieties which performed poorly because they were genetically salt-susceptible from those which germinated poorly due to poor seed quality. It is argued that the seed vigour of seed lots used in genotype evaluation should be assessed in order to avoid discarding potentially useful genotypes because of poor physiological seed quality.

Putrescine Reduces NaCl-Induced Inhibition of Germination and Early Seedling Growth of Rice (Oryza sativa L.)

1988 ◽  
Vol 15 (6) ◽  
pp. 761 ◽  
Author(s):  
L Prakash ◽  
G Prathapasenan
Keyword(s):  
Salt Stress ◽  
Water Uptake ◽  
Seedling Growth ◽  
Oryza Sativa L ◽  
Chloride Ions ◽  
Embryo Axis ◽  
Nacl Solution ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Germination And Growth

Changes induced by NaCl and putrescine during germination and early seedling growth of rice were examined for 120 h. Rates of germination and growth of embryo axis decreased when seeds were subjected to salt stress (100, 150 and 200 mM NaCl). NaCl at 150 mM concentration significantly reduced the water uptake of seeds and the rate of mobilisation of reserves. All concentrations of putrescine (0.001, 0.01, 0.1 and 1.0mM) applied exogenously to seeds increased the rate of germination and seedling growth when NaCl(150 mM) was also present and 0.01 mM putrescine gave maximum response. Addition of putrescine (0.01 mM) to NaCl solution (150 mM) reduced the net accumulation of sodium and chloride ions in seeds and increased their water uptake. Thus, putrescine can alleviate the adverse effects of NaCl during germination and early seedling growth of rice.

scholarly journals The Salinity Effects on Germination and Early Seedling Growth of Bean Plants (Bean Phaseolus)

2020 ◽  
Keyword(s):  
Seedling Growth ◽  
Germination Rate ◽  
Petri Dish ◽  
Normal Weight ◽  
Bean Plant ◽  
Control Group ◽  
Early Seedling Growth ◽  
Bean Plants ◽  
Root And Shoot Length ◽  
Early Seedling

The study was conducted at Dilla University, in the laboratory of Biological sciences to see the effects of salinity on germination and early seedling. Objectives:Background: It is estimated that the world 20% of farming land and 50% of cropland is salt stressed and salinity decreases the germination of seed, retards the growth of plant and so it reduces the yield of crop. Objectives: The major objective of this research was to evaluate the effects of salinity on the germination and early seedling growth of bean plants. Specifically, to investigate salt tolerant efficiency, salt effect on seed germination and its rate and growth of bean plant at different concentration of NaCl. Methodology: The experiment required 21 groups, of which 20 of them were experimental with different salt concentrations ranging from 0.05M to 1.00M with 0.05M difference and one control group. Each group contain three bean seed measuring its weight using electronic balance machine, sterilized with 70% Alcohol solution for 15 seconds, rinsed with distilled water, placed in separate Petri dish using a forceps, 50ml of solution were added to each Petri dish with different concentration, all Petri dishes were covered with lids and kept into incubator at room temperature for 17 days, germinated seed were counted, seedlings root and shoot length were measured using a ruler. Finally, the Bean was transferred to non-saline condition, weight of germinated Bean were measured to compare with their normal weight and to determine the effects of salt on seed weight, which was conducted in triplicates. All necessary data was taken, analyzed and interpreted in the form of percentage, graph, tables and figures. Result: When the concentration of salt increased the Bean plant is extremely affected, germination rate decreased and the terminal weights of seed were become lower than the initial weight due to the absorption of water by seed. Conclusions: The rate of germination decrease when the salt concentration increased and late growth of length of root and shoot when the salt dosage is highest and also the weights of seed reduced as concentration of salt is raised. Generally, as the concentration of salt is increased the Bean plant is extremely affected.

scholarly journals Allelopathic activity of aqueous decomposed leaf litter extracts on the germination and early seedling growth of cowpea (Vigna unguiculata) in Aden, Yemen

2021 ◽  
Vol 10 (2) ◽  
pp. 191-195
Author(s):  
Hana A. Al-Quhbi ◽  
Amna A.I. Saeed ◽  
Abdul Nasser Al-Gifri
Keyword(s):  
Leaf Litter ◽  
Seedling Growth ◽  
Growth Parameters ◽  
Germination Rate ◽  
Germination Percentage ◽  
Allelopathic Effect ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
The Difference ◽  
Radicle Length

Allelopathic effect of Aqueous decomposed leaf litter from four common trees and shrubs in Aden governorate, Yemen was investigated on the germination and early seedling growth of Cowpea, the test crop was subjected to four concentrations of 25, 50, 75 and 100% of the aqueous extract, while a control was maintained at 0% extract level. The study carried out in the laboratory of Botany at Faculty of Education, University of Aden. The Percentage of germination, Germination rate per plate, radicle length, plumule, (hypo and epicotyl lengths) observed. Data was recorded at 24 hours interval after germination for 15 days, the research revealed delayed germination rate per plate and a significant reduction in the radicle length and germination percentage (data was collected on percentage germination; plant height. Results obtained showed that significant reduction in the growth parameters considered at 100% and 75%, while at 50% and 25% the difference was not significant. From the result obtained, it can concluded that Conocarpus lancefolius and Thevetia peruviana possess allelopathic effect that inhibit the germination and early seedling growth of Cowpea, hence at 100% concentration.

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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