scholarly journals Application Effect of Potassium on Rice (Oryza sativa L.) Recovery After Drought Stress

2020 ◽  
Vol 21 (2) ◽  
pp. 115
Author(s):  
Tri Handoyo ◽  
Mohammad Sulton Hakim ◽  
Parawita Dewanti ◽  
Sri Hartatik ◽  
Slameto Slameto
Keyword(s):  
Drought Stress ◽  
Oryza Sativa L ◽  
Phase 1 ◽  
Dry Weight ◽  
Rice Grain ◽  
Phase 2 ◽  
Potassium Fertilizer ◽  
Vegetative Phase ◽  
Rice Plants ◽  
Generative Phase

The critical phase of rice plants on water availability includes the vegetative phase when tillering stage, generative phase 1 at panicle initiation stage and generative phase 2 when booting stage. The lack of water in the vegetative phase and in the generative phase will disturb the growth of rice plants. However, if the water needs are fulfilled immediately, the plants will recover and able to grow normally. The ability of plants to do recovery can be improved through the application of potassium fertilizer. This research aimed to determine the optimum dosage of potassium fertilizer when drought occurs in several critical phases to improve the recovery capability of the rice plant. This experiment used a completely randomized design (CRD) with 2 factors where the first factor was the dosage of potassium fertilizer using KCl fertilizer which was 50 kg/ha, 75 kg/ha, 100 kg/ha and 125 kg/ha. The second factor was the difference in the phase of stress, namely the vegetative phase at the time of tillering, the generative phase 1 at panicle initiation and the generative phase 2 when booting. Each treatment combination was repeated 3 times. Observation variables included Rice grain weight per clump, Proline content, Root Dry Weight, Relative Water Content (RWC) leaves, and Height of plants. The results of the study proved that the best dosage of KCl fertilizer to improve rice recovery ability is 100 kg/ha. Rice plants gripped in the vegetative phase have better recovery capabilities than those gripped in the generative phase.Keywords: Recovery, rice, drought stress and potassium.

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 Growth and Mineral Nutrition of Rice (Oryza Sativa L.) Grown on Tannery Effluent Polluted Soil Amended With Cowdung and Lime

2021 ◽  
Vol 6 (2) ◽  
pp. 47-54
Author(s):  
N Afrida ◽  
AS Chamon ◽  
MK Hossain ◽  
GA Shimi ◽  
MN Mondol
Keyword(s):  
Heavy Metal ◽  
Oryza Sativa ◽  
Contaminated Soils ◽  
Metal Toxicity ◽  
Oryza Sativa L ◽  
Dry Weight ◽  
Polluted Soil ◽  
Tannery Effluent ◽  
Rice Plants ◽  
Lime Application

Pot experiments were carried out with rice (Oryza sativa L.) to evaluate the plant response of different amendments to ameliorate heavy metal toxicity. Cowdung and lime were applied at the rate of 10 ton/ha. Both cowdung and lime application led to an increase in growth of rice and significant reductions of Zn, Ni, Cu and Cr in plant. The length, fresh and dry weight and N, P, K, Na, Ca and Mg concentrations in rice plants were increased significantly. The concentrations of Cu, Zn, Ni, Pb and Cr in rice grown on contaminated soils were significantly higher as compared to the control. Cowdung and lime significantly reduced Cu, Zn, Ni, Pb and Cr concentrations in comparison to control. Chromium concentrations in lime treated plants were reduced by 57.89% in rice as compared to cowdung. Lime proved to be more efficient in reducing the concentration of metals in rice plants. J. Biodivers. Conserv. Bioresour. Manag. 2020, 6(2): 47-54

scholarly journals Gluconacetobacter diazotrophicus Changes The Molecular Mechanisms of Root Development in Oryza sativa L. Growing Under Water Stress

2020 ◽  
Vol 21 (1) ◽  
pp. 333 ◽  
Author(s):  
Renata Silva ◽  
Luanna Filgueiras ◽  
Bruna Santos ◽  
Mariana Coelho ◽  
Maria Silva ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Root Growth ◽  
Root Development ◽  
Molecular Mechanisms ◽  
Oryza Sativa L ◽  
Gluconacetobacter Diazotrophicus ◽  
Red Rice ◽  
Bacterial Inoculation ◽  
Rice Plants

Background: Inoculation with Gluconacetobacter diazotrophicus has shown to influence root development in red rice plants, and more recently, the induced systemic tolerance (IST) response to drought was also demonstrated. The goal of this study was to evaluate the inoculation effect of G. diazotrophicus strain Pal5 on the amelioration of drought stress and root development in red rice (Oryza sativa L.). Methods: The experimental treatments consist of red rice plants inoculated with and without strain Pal5 in presence and absence of water restriction. Physiological, biochemical, and molecular analyses of plant roots were carried out, along with measurements of growth and biochemical components. Results: The plants showed a positive response to the bacterial inoculation, with root growth promotion and induction of tolerance to drought. An increase in the root area and higher levels of osmoprotectant solutes were observed in roots. Bacterial inoculation increased the drought tolerance and positively regulated certain root development genes against the water deficit in plants. Conclusion: G. diazotrophicus Pal5 strain inoculation favored red rice plants by promoting various root growth and developmental mechanisms against drought stress, enabling root development and improving biochemical composition.

scholarly journals Leaf Area and Stomata Index of Rice Plants (Oryza sativa L.) Cisokan and Batang Piaman Varieties to Drought Stress

BioScience ◽  
2017 ◽  
Vol 1 (2) ◽  
pp. 77
Author(s):  
Putri Widianti ◽  
Violita Violita ◽  
Moralita Chatri
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Leaf Area ◽  
Oryza Sativa L ◽  
Rice Plants

Ectopic expression of PgRab7 in rice plants (Oryza sativa L.) results in differential tolerance at the vegetative and seed setting stage during salinity and drought stress

PROTOPLASMA ◽  
2015 ◽  
Vol 254 (1) ◽  
pp. 109-124 ◽  
Author(s):  
Manas Kumar Tripathy ◽  
Budhi Sagar Tiwari ◽  
Malireddy K. Reddy ◽  
Renu Deswal ◽  
Sudhir K. Sopory
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Oryza Sativa L ◽  
Ectopic Expression ◽  
Seed Setting ◽  
Rice Plants

scholarly journals Therapeutic Education's Role in the Management of Hypertension in Chronic Hemodialysis Patients

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Intissar Haddiya ◽  
Ryme El Harraqui ◽  
Ilham Karimi ◽  
Nawal Benabdallah ◽  
Yassamine Bentata
Keyword(s):  
Phase 1 ◽  
Dry Weight ◽  
Hemodialysis Patients ◽  
Chronic Hemodialysis ◽  
Therapeutic Education ◽  
Phase 2 ◽  
Phase 3 ◽  
Educational Effort ◽  
Interdialytic Weight Gain ◽  
Weight Method

The prevalence of hypertension remains high in hemodialysis (HD) patients, leading to a considerable morbimortality. The “dry weight method (DW),” established by Scribner, presents an undeniable interest in the management of hypertension in HD patients. Aim. The aim of our work was to determine the prevalence and risk factors (RFs) of hypertension in our chronic HD patients and try to reduce it by using a therapeutic education (TE) strategy based on Scribner’s recommendations. Patients and Methods. We led an interventional prospective study in three phases. In phase 1, we determined the prevalence of hypertension. In phase 2, hypertensive patients benefited of a TE strategy. In phase 3, we evaluated the effects of our TE. Results. Hypertension was noted in 57 patients. RFs for hypertension included age, important interdialytic weight gain (IDWG), noncompliance to the dietary rules, and a rhythm of 2 sessions of dialysis per week. The use of a TE strategy enabled us to correct hypertension in some of our HD patients. Conclusion. A TE strategy improved the hypertension rate in our HD unit. This success could not be conceived without an educational effort supported by the whole medical team.

scholarly journals Seed Quality of Paddy Variety (Oryza sativa L.) Resistant to Vegetative Phase Drought Stress

2021 ◽  
Vol 10 (1) ◽  
pp. 122-139
Author(s):  
Winggi Anggun Jati ◽  
Zaidan Panji Negara ◽  
Firdaus Sulaiman
Keyword(s):  
Drought Stress ◽  
Seed Quality ◽  
Oryza Sativa L ◽  
Germination Rate ◽  
Vegetative Phase ◽  
Vigor Index ◽  
Quality Value ◽  
Germination Value ◽  
Simultaneous Growth

Drought is an abiotic stress that can affect paddy yields by inhibiting growth, thereby reducing the quality of the seeds produced. This study aimed to find out the best seed quality of several paddy varieties produced from the plants experiencing drought stress in the vegetative phase. The varieties used in the study were Inpago 12, Unsoed 1, Inpago 4, Inpago 5, Inpago 9, Inpago 8, Inpago 10, Inpara 8, Inpara 9, Rindang 1, Rindang 2, Situ Patenggang, Towuti, and Batu Tegi. The drought stress was applied to the vegetative phase of the plant by reducing the intensity of water supply (63.5% moisture content), then the resulting seeds were tested in the laboratory. The results of the study showed that the highest seed quality value in the drought stress treatment of the vegetative phase were the Inpara 8 variety, followed by the Towuti variety with 93.33% and 88% germination values, 82.67% and 70% simultaneous growth, 12.11% and 8.44% germination rate, 64% and 64% germination strength, and 18.99 and 16.83 vigor indexes. Meanwhile, the lowest seed quality was the Inpago 8 variety with 26% germination value, 21.33% simultaneous growth, 1.33% germination speed, 3.33% germination strength, and 2.71 vigor index. Among all the varieties tested, the Inpara 8 and Towuti are those with the best seed quality values ​​after experiencing drought stress during the vegetative phase.

scholarly journals Influence of sewage sludge on yield and mineral contents of rice grain

2014 ◽  
Vol 26 (1-2) ◽  
pp. 57-60 ◽  
Author(s):  
ATMM Kamal ◽  
MM Islam ◽  
MS Hossain ◽  
SM Ullah
Keyword(s):  
Oryza Sativa ◽  
Detection Limit ◽  
Sewage Sludge ◽  
Oryza Sativa L ◽  
Dry Weight ◽  
Rice Grain ◽  
Mineral Contents ◽  
Rice Grains ◽  
Sludge Application

Sewage sludge at the rate of 0, 40, 80, 120 and 240 t/ha showed that the number of filled grains per panicle, dry weight of grains and weight of 1000 grains of rice (Oryza sativa L.) were the significantly highest where 240 tons of sewage sludge per hectare was added. The contents of N, P, K, Ca, Mg, Fe, Cu, Zn and Pb in rice grains increased significantly with increasing rate of sewage sludge application, while that of Mn decreased significantly. Chromium, cadmium and nickel contents in the rice grain were below detection limit. DOI: http://dx.doi.org/10.3329/bjsr.v26i1-2.20231 Bangladesh J. Sci. Res. 26(1-2): 57-60, December-2013

scholarly journals Genetic Relationship and Structural Variation of Root Growth Angle for Deep Rooting in Rice (Oryza sativa L.)

2020 ◽  
pp. 79-90
Author(s):  
R. Arulmozhi ◽  
A. John Joel ◽  
K. Sathiya Bama ◽  
P. Boominathan ◽  
R. Suresh
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Root Growth ◽  
Oryza Sativa L ◽  
Association Studies ◽  
Strong Association ◽  
Root Traits ◽  
Dry Weight ◽  
Growth Angle ◽  
Root Growth Angle

Breeding for drought tolerance revolves around selection of genotypes with desirable root characters. Root pattern studies in rice have shown significant relationship with drought tolerance. In order to understand the effects of deep rooting pattern and root growth angle in relation to water stress was assessed following basket method. The Backcross inbred lines (BILs) of ADT (R) 45*1/Apo and ADT (R) 45*1/Wayrarem with drought QTLs viz., qDTY1.1, qDTY3.1, qDTY4.1 and qDTY12.1 were evaluated for various root traits.  Out of 20 BILs and three parental lines studied four BILs showed high values for root growth at deep angle 65-90 °and yield under drought stress. Based on association studies among the root traits positive and significant correlation was observed between yield and root traits viz., root dry weight, root growth at deep angle 65-90° (RA4), ratio of deep rooting and root length. Clustering of BILs and parents have grouped deep rooting BILs and drought tolerant donors into one cluster and drought susceptible ADT (R) 45 into a separate cluster II which clearly indicates, the importance of deep rooting and yield under drought stress. Strong association of root traits and drought tolerance clearly shows the importance in utilization of these traits as selection criteria for drought tolerance in rice.

scholarly journals Effects of Drought Stress on Growth and Accumulation of Proline in Five Rice Varieties (Oryza Sativa L.)

2019 ◽  
Vol 45 (2) ◽  
pp. 241-247
Author(s):  
Shukanta Saha ◽  
Hasna Hena Begum ◽  
Shamima Nasrin
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Oryza Sativa L ◽  
Dry Weight ◽  
Proline Accumulation ◽  
Shoot Length ◽  
Fresh Weight ◽  
Rice Varieties ◽  
Shoot Dry Weight ◽  
Effects Of Drought

A pot experiment was conducted to study the effect of drought stress on growth and accumulation of proline in five rice varieties namely BRRI dhan-30, BRRI dhan-32, BRRI dhan-34, BRRI dhan-38 and BRRI dhan-56 and to characterize them on the basis of their behavior of drought tolerance. Drought stress caused the decrease of growth like root length, shoot length, root fresh weight, shoot fresh weight, root dry weight, shoot dry weight, the ratio of root-shoot length. Among the rice varieties, BRRI dhan-56 showed the lowest decrease of growth of plant. BRRI dhan-56 showed the least decrease of water content in both root and shoot. On the other hand, the accumulation of proline was increased in five rice varieties under stress. BRRI dhan-56 showed the highest (3.7- folds) increase in the accumulation of proline in leaf under stress. This study suggests that BRRI dhan-56 may possess drought tolerance characteristics while BRRI dhan-30, BRRI dhan-32, BRRI dhan-34 and BRRI dhan-38 may be drought sensitive based on their growth and proline accumulation behavior. Asiat. Soc. Bangladesh, Sci. 45(2): 241-247, December 2019

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