Character Selection and Tolerance Screening Efectivity on Static Hydroponic Method Under Drought Stress in Rice

This research was aimed to evaluate the efectivity of screening method and identification of tolerance screening selection character in statis hydroponic system towards drough stress. The research was carried out in Hydroponic Screenhouse Perdos Unhas, Tamalanrea, Makassar which throughout February-April 2020. This research was conducted in factorial design in nested patterns, where environment was the nested replication. Environments used were normal (0% PEG) and drought stress (10% PEG). Five rice varieties were used: Inpari 34, Ciherang, IR29 and Jeliteng. Research result showed that canopy height and fresh weight were the suitable selection character in drought tolerance screening through statis hydroponic cultivation. Grouping consistency was found between drought and salinity stress. Inpari 34, Ciherang, Jeliteng and Inpari 29 was considered to be have drought tolerance, whilst IR29 was examined to be responsive to drough stress in hydroponic culture. From the overall result, it can be concluded that hydroponic screening and PEG application was quite effective in rice drought stress tolerance screening

Download Full-text

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

Journal of the Asiatic Society of Bangladesh Science ◽

10.3329/jasbs.v45i2.46597 ◽

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

Download Full-text

Penconazole and calcium ameliorate drought stress in canola by upregulating the antioxidative enzymes

Functional Plant Biology ◽

10.1071/fp19341 ◽

2020 ◽

Vol 47 (9) ◽

pp. 825 ◽

Cited By ~ 1

Author(s):

Maryam Rezayian ◽

Vahid Niknam ◽

Hassan Ebrahimzadeh

Keyword(s):

Oxidative Stress ◽

Lipid Peroxidation ◽

Drought Stress ◽

Drought Tolerance ◽

Antioxidative Enzymes ◽

Proline Content ◽

Fresh Weight ◽

Negative Effects ◽

Mda Content ◽

Effects Of Drought

The aim of this research was to gauge the alternations in the lipid peroxidation and antioxidative enzyme activity in two cultivars (cv. RGS003 and cv. Sarigol) of canola under drought stress and drought tolerance amelioration by penconazole (PEN) and calcium (Ca). Plants were treated with different polyethylene glycol (PEG) concentrations (0, 5, 10 and 15%) without or with PEN (15 mg L–1) and Ca (15 mM). The Ca treatment prevented the negative effects of drought on fresh weight (FW) in RGS003 and Sarigol at 5 and 15% PEG respectively. Ca and PEN/Ca treatments caused significant induction in the proline content in Sarigol at 15% PEG; the latter treatment was accompanied by higher glycine betaine (GB), lower malondialdehyde (MDA) and growth recovery. Hydrogen peroxide (HO2) content in Sarigol was proportional to the severity of drought stress and all PEN, Ca and PEN/Ca treatments significantly reduced the H2O2 content. PEN and PEN/Ca caused alleviation of the drought-induced oxidative stress in RGS003. RGS003 cultivar exhibited significantly higher antioxidative enzymes activity at most levels of drought, which could lead to its drought tolerance and lower MDA content. In contrast to that of Sarigol, the activity of catalase and superoxide dismutase (SOD) increased with Ca and PEN/Ca treatments in RGS003 under low stress. The application of PEN and Ca induced significantly P5CS and SOD expression in RGS003 under drought stress after 24 h. Overall, these data demonstrated that PEN and Ca have the ability to enhance the tolerance against the drought stress in canola plants.

Download Full-text

Selection of Fertilizer and Cultivar of Sweet Pepper and Eggplant for Hydroponic Production

Agronomy ◽

10.3390/agronomy9080433 ◽

2019 ◽

Vol 9 (8) ◽

pp. 433

Author(s):

Hardeep Singh ◽

Bruce L. Dunn ◽

Mark Payton ◽

Lynn Brandenberger

Keyword(s):

Solanum Melongena ◽

Shape Index ◽

Sweet Pepper ◽

Fruit Production ◽

Fruit Shape ◽

Fresh Weight ◽

Hydroponic System ◽

Shoot Fresh Weight ◽

Hydroponic Cultivation ◽

Shoot Weight

Dutch bucket hydroponic trials were conducted with the aim to evaluate the effects of different hydroponic fertilizers (5N-4.8P-21.6K, 5N-5.2P-21.6K, and 7N-3.9P-4.1K) on growth, fruit production, and the fruit quality (fruit shape index) parameters of two cultivars of sweet pepper (Capsicum annuum L.) and on two cultivars of eggplant (Solanum melongena L.). For sweet pepper yield, the 5N-4.8P-21.6K fertilizer was responsible for the greatest yield for both cultivars. For sweet pepper fresh and dry shoot weight interaction, the ‘Orangella’ cultivar had greater growth in 5N-4.8P-21.6K and 5N-5.2P-21.6K fertilizers, whereas there was no difference among cultivars in 7N-3.9P-4.1K. Shape index was not affected by fertilizers or cultivars. For the eggplant yield, there was no main effect nor interaction between fertilizers and cultivars for fruit yield, while the interaction between fertilizers and cultivars was significant for shoot fresh weight production. Shoot fresh weight was greater for ‘Angela’ than ‘Jaylo’ in 5N-4.8P-21.6K and 7N-3.9P-4.1K. Furthermore, both eggplant cultivars were affected with yellowing of fruits in all fertilizer treatments after 2 months, which was probably due to the accumulation of nutrients in the closed hydroponic system. Therefore, hydroponic producers could select 5N-4.8P-21.6K and 5N-5.2P-21.6K fertilizers for the cultivation of the ‘Orangella’ cultivar of sweet pepper based on yield. It is important to evaluate more fertilizers and cultivars for eggplant hydroponic cultivation.

Download Full-text

Combining Ability for Drought Tolerance in Upland Rice Varieties at Reproductive Stage

Journal of Agricultural Science ◽

10.5539/jas.v9n3p138 ◽

2017 ◽

Vol 9 (3) ◽

pp. 138 ◽

Cited By ~ 2

Author(s):

G. M. Malemba ◽

F. M. Nzuve ◽

J. M. Kimani ◽

M. F. Olubayo ◽

J. W. Muthomi

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Combining Ability ◽

Upland Rice ◽

Block Design ◽

Field Evaluation ◽

Rice Production ◽

Rice Varieties ◽

F2 Population ◽

Drought Conditions

Rice is an important food crop for human population ranking second among the mostly consumed cereal grains worldwide. Upland rice production is greatly constrained by drought stress resulting from rainfall variation patterns. Cultivation of drought tolerant varieties is considered the best option for drought management in rice production. The already released upland rice varieties are drought susceptible and have poor grain attributes hence, the aim of this study was to determine the combining ability for drought tolerance in upland rice. Four upland NERICA and two upland rice varieties were selected as parents for generating F1s crosses following 6 × 6 complete diallel. The generated 30 F1 crosses were advanced to F2 population for field evaluation. The F2 progenies together with six parents were planted in two sites; KALRO-Mwea Center Farm and Kirogo research Farm following a randomized complete block design in three replications. Drought stress was initiated 45 days after sowing after which data was collected on drought and agronomic parameters. The study revealed large genetic variations among the genotypes used. Both GCA and SCA were significant indicating the importance of both additive and non additive gene action in the expression of studied traits. In this study NERICA 2 and NERICA 15 were identified as good combiners for drought tolerance and grain yield under drought conditions. The single crosses namely; NERICA 15 × NERICA 2, NERICA 1 × NERICA 15, NERICA 11 × NERICA 15 and NERICA 2 × NERICA 15 were identified as superior for improving yield under drought conditions.

Download Full-text

Influence of the N/K ratio on the production and quality of cucumber in hydroponic system

Revista CERES ◽

10.1590/s0034-737x2011000500012 ◽

2011 ◽

Vol 58 (5) ◽

pp. 619-624 ◽

Cited By ~ 2

Author(s):

Adriene Woods Pedrosa ◽

Herminia Emilia Prieto Martinez ◽

Edson Marcio Matiello ◽

Paulo Cezar Rezende Fontes ◽

Paulo Roberto Gomes Pereira

Keyword(s):

Nutrient Solution ◽

Vegetative Growth ◽

Additional Treatment ◽

Fresh Weight ◽

Hydroponic System ◽

Randomized Design ◽

Hydroponic Cultivation ◽

Fruit Setting ◽

Nutrient Solutions

The objective of this work was to evaluate the quality of fruits and the nutritional status of cucumber CV. Aodai cultivated in nutrient solutions with different N:K ratios. The hydroponic cultivation was initially performed, during the vegetative growth, in nutrient solution with 1:2.0 mmol L-1 N:K, and, later, during fruit setting, in four different nutrient solutions with N:K (w/w) at the ratios 1:1.4, 1:1.7, 1:2.0 and 1:2.5. An additional treatment with a nutrient solution containing the ratio 1:2.2 (w/w) N:K during the vegetative growth and N:K 1:1.4 (w/w) during fruit setting, both with 10% ammonium (NH4+) was included. The treatments were arranged in a randomized design with six replicates. Irrigation was carried out with deionized water until seed germination, and then with nutrient solution until 30 days after germination, when plants were transplanted. Plants in the hydroponic growing beds were irrigated with the solutions for vegetative growth, and, after 21 days, the solutions were replaced by solutions for fruit setting. At 45 and 60 days after transplanting, the fresh weight, length, diameter, volume and firmness of the fruit were evaluated, and, at 45 days after transplanting, the macronutrient concentrations in the leaves were determined. The use of different N:K ratios during fruit setting influenced the cucumber production. The ratio of 1.0:1.7 N: K (w/w), with 10% of N in the form of ammonia, is recommended for the whole cycle.

Download Full-text

Evaluation of the tolerance of Thai indigenous upland rice germplasm to early drought stress using multiple selection criteria

Plant Genetic Resources ◽

10.1017/s1479262115000428 ◽

2015 ◽

Vol 15 (2) ◽

pp. 109-118 ◽

Cited By ~ 1

Author(s):

Kittichai Narenoot ◽

Tidarat Monkham ◽

Sompong Chankaew ◽

Patcharin Songsri ◽

Wattana Pattanagul ◽

...

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Selection Criteria ◽

Upland Rice ◽

Block Design ◽

Rice Variety ◽

Tolerance Index ◽

Rice Varieties ◽

Rice Germplasm ◽

Drought Tolerance Index

Drought remains the most important factor that affects rice productivity, especially in rainfed areas, worldwide. Upland rice is one of the crop choices of farmers in the rainfed environment. Although upland rice varieties require less water than lowland rice varieties, yields often remain limited by drought, particularly in the period of early growth. The aims of this study were to identify the traits related to early drought tolerance in upland rice varieties, and to identify the potential sources of germplasm for early drought tolerance. A total of sixty upland rice varieties were planted in a factorial experiment with a randomized complete block design with 3 replications in the rainy seasons of 2011 and 2012, under greenhouse conditions. Based on the drought tolerance index (DTI), the test germplasm sources were classified into three groups: (i) susceptible; (ii) moderately tolerant; (iii) tolerant to drought stress. Grain yield (GY) showed significant negative correlations with the leaf rolling score (r= − 0.623, P< 0.01), the leaf death score (LDS) (r= − 0.673, P< 0.01) and the recovery score (r= − 0.746, P< 0.01), while leaf dry matter (r= 0.698, P< 0.01) and leaf water potential (r= 0.618, P< 0.01) had significant positive correlations with GY. These findings indicate the suitability of the DTI as the selection criteria for early drought tolerance in a breeding programme. In addition, the upland rice germplasm accessions KKU-ULR011, KKU-ULR012, KKU-ULR125, KKU-ULR199 and KKU-ULR292 were identified as having high levels of stability for drought tolerance in both the 2011 and 2012 experiments, suggesting their potential for further use for rice variety improvement for drought tolerance.

Download Full-text

Root Distribution and Its Impacts on the Drought Tolerance Capacity of Hybrid Rice in the Sichuan Basin Area of China

Agronomy ◽

10.3390/agronomy9020079 ◽

2019 ◽

Vol 9 (2) ◽

pp. 79 ◽

Cited By ~ 2

Author(s):

Xuechun Wang ◽

Naseem Samo ◽

Lamei Li ◽

Mengran Wang ◽

Muslim Qadir ◽

...

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Root System ◽

Root Distribution ◽

Hybrid Rice ◽

Soil Layer ◽

Tolerance Index ◽

Deep Soil ◽

Rice Varieties ◽

Major Factors

Drought is one of the major factors limiting rice yield worldwide. A total of 46 hybrid rice varieties were chosen to investigate their root distribution and their response to drought. A field experiment was carried out in a dry shed building to evaluate the drought tolerance capacity of hybrid rice varieties on the basis of CTIRDE (complex tolerance index of rice under drought environment) values. Next, the experiment was conducted in a specially designed pot system and seed bags to analyze the root distribution and activity of antioxidant enzymes in different rice varieties. Moreover, the DEEPER ROOTING 1 (DRO1) gene was sequenced to elucidate its role in the root distribution of typical rice varieties. On the basis of CTIRDE values, the 46 hybrid rice varieties were classified as tolerant (CTIRDE ≥ 0.75), semi-tolerant (0.75 > CTIRDE > 0.65), or sensitive (CTIRDE ≤ 0.65) to drought stress. The tolerant varieties (Chuanguyou208 and Deyou4727) displayed a significantly larger length, had higher number and weight of roots in the 30–50 cm soil layer, and exhibited a significantly higher activity of Superoxide dismutase (SOD) and Peroxidase (POD) enzymes in roots during the drought stress period. The DRO1 gene sequencing results revealed that the tolerant and sensitive varieties exhibited a single-nucleotide polymorphism (SNP) in the 3-exon region, and the tolerant varieties (Chuanguyou208 and Deyou4727) exhibited a larger root growth angle with the horizontal axis, hence developing a deeper root system as compared with the other two group varieties. A significant correlation was found not only between the DRO1 gene and root distribution but also between DRO1 and the activity of SOD and POD enzymes. Conclusively, as a key feature, a deep root system enabled tolerant rice varieties (Chuanguyou208 and Deyou4727) to avoid drought stress by absorbing more water stored in deep soil layers. The root distribution, activity of POD and SOD enzymes in roots, and DRO1 gene can be used to screen tolerant rice varieties that can survive better under drought stress during the seedling stage of rice growth.

Download Full-text

Genome-Wide Approach to Identify Quantitative Trait Loci for Drought Tolerance in Tetraploid Potato (Solanum tuberosum L.)

International Journal of Molecular Sciences ◽

10.3390/ijms22116123 ◽

2021 ◽

Vol 22 (11) ◽

pp. 6123

Author(s):

Christina Schumacher ◽

Susanne Thümecke ◽

Florian Schilling ◽

Karin Köhl ◽

Joachim Kopka ◽

...

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Quantitative Trait ◽

Starch Content ◽

Tuber Quality ◽

Tolerance Index ◽

Fresh Weight ◽

Major Interest ◽

Tuber Fresh Weight ◽

Starch Yield

Drought represents a major abiotic stress factor negatively affecting growth, yield and tuber quality of potatoes. Quantitative trait locus (QTL) analyses were performed in cultivated potatoes for drought tolerance index DRYM (deviation of relative starch yield from the experimental median), tuber starch content, tuber starch yield, tuber fresh weight, selected transcripts and metabolites under control and drought stress conditions. Eight genomic regions of major interest for drought tolerance were identified, three representing standalone DRYM QTL. Candidate genes, e.g., from signaling pathways for ethylene, abscisic acid and brassinosteroids, and genes encoding cell wall remodeling enzymes were identified within DRYM QTL. Co-localizations of DRYM QTL and QTL for tuber starch content, tuber starch yield and tuber fresh weight with underlying genes of the carbohydrate metabolism were observed. Overlaps of DRYM QTL with metabolite QTL for ribitol or galactinol may indicate trade-offs between starch and compatible solute biosynthesis. Expression QTL confirmed the drought stress relevance of selected transcripts by overlaps with DRYM QTL. Bulked segregant analyses combined with next-generation sequencing (BSAseq) were used to identify mutations in genes under the DRYM QTL on linkage group 3. Future analyses of identified genes for drought tolerance will give a better insight into drought tolerance in potatoes.

Download Full-text

Present Status and Future Prospects of Drought Tolerance in Rice

10.5772/intechopen.97461 ◽

2021 ◽

Author(s):

Veerendra Jaldhani ◽

Ponnuvel Senguttuvel ◽

Bathula Srikanth ◽

Puskur Raghuveer Rao ◽

Desiraju Subrahmanyam ◽

...

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Global Climate ◽

Growth And Yield ◽

Rice Varieties ◽

Drought Tolerant ◽

Area Of Concern ◽

Genomic Regions ◽

Upland Conditions ◽

Good Number

Rice is an important staple food crop across the world. It is mainly cultivated under irrigated lowland and also rain-fed upland conditions where drought stress is often noticed. Global climate change predicts an intensification of drought stress in future due to uneven rainfall which was witnessed for the last few years. Confronting drought stress can deliver fruitful crop returns in rice and scope for research extents. Drought stress affects the overall plant growth and yield. A prominent improvement has been made during last two decades in our understanding of the mechanisms involved in adaptation and tolerance to drought stress in rice. In order to achieve the marked crop returns from rainfed areas, there is a requisite of drought tolerant rice varieties, and genetic improvement for drought tolerance should be a prime area of concern in the future. A huge rice germplasm is available and good number of the germplasm possess drought tolerance and these genomic regions have been exploited in developing some drought tolerant rice varieties. The application of available genotyping methodologies, the identification of traits of interest, and key genetic regions associated with the drought tolerance have opened new prospects to successfully develop new drought tolerant varieties. This chapter deals with the importance of drought tolerance in rice crop followed by the evolution of molecular markers and breeding techniques in identifying drought tolerant QTL’s/genes and their utilization in the improvement of drought tolerant rice varieties.

Download Full-text

Natural Variation of OsLG3 Controls Drought Stress Tolerance in Rice by Inducing ROS Scavenging

10.1101/228403 ◽

2017 ◽

Cited By ~ 1

Author(s):

Haiyan Xiong ◽

Jianping Yu ◽

Jinjie Li ◽

Xin Wang ◽

Pengli Liu ◽

...

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Natural Variation ◽

Upland Rice ◽

High Yield ◽

Water Deficit Stress ◽

Rice Grain ◽

Ros Scavenging ◽

Rice Varieties ◽

Scavenging Efficiency

AbstractBackgroundImproving performance of rice under drought stress has potential to significant impact on rice productivity. Previously we reported that OsLG3 positively control rice grain length and yield.ResultsIn this study, we found that OsLG3 was more strongly expressed in upland rice compared to lowland rice under drought stress condition. Candidate gene association analysis showed that the natural variation in OsLG3 was associated with tolerance to water deficit stress in germinating rice seeds. Transgenic rice with enhanced OsLG3 expression exhibited improved tolerance to drought and that is most likely due to enhanced ROS scavenging efficiency. Phylogenetic analysis and pedigree records indicated that the tolerant allele of OsLG3 has potential to improve drought tolerance of japonica rice.ConclusionsCollectively, our work revealed that the natural variation of OsLG3 contributes to rice drought tolerance and the elite allele of OsLG3 is a promising genetic resource for the development of drought-tolerant and high-yield rice varieties.

Download Full-text