Recognition of rice seedling rows based on row vector grid classification

Seedling blight, caused by the fungus Fusarium oxysporum, significantly lowers rice production globally. Earlier reports have opined that endophytic bacteria strains could be possible biocontrol agents, but the mechanistic actions involved are still unclear. Therefore, this study aimed to isolate the endophytic bacteria with high inhibitory activity and elucidate its possible mechanisms for inducing resistance by metabolomics. The results showed that mdj-36 had the strongest in vitro pathogen inhibition of F. oxysporum, while mdj-34 displayed the lowest inhibitory activity identified as Bacillus velezensis strains. Metabolomic analyses demonstrated that B. velezensis mdj-36 growth medium could produce higher organic acids, terpenes, and diterpene than B. velezensis mdj-34. Further investigation revealed that ‘secondary bile acid biosynthesis’ and ‘glycerophospholipid metabolism’ pathways played essential roles in defense response towards F. oxysporum. This study’s findings provide a credible theoretical basis for the possible use of the B. velezensis strain against rice seedling blight.

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Development of Three Row Self-Propelled Zero till Direct Seeded Rice Planter Cum Fertilizer Applicator

Journal of Ravishankar University (Part-B) ◽

10.52228/jrub.2019-32-1-8 ◽

2019 ◽

Vol 32 (1) ◽

pp. 38-42

Author(s):

Rashmi Anil Bangale

Keyword(s):

Power Transmission ◽

Field Capacity ◽

Fertilizer Application ◽

Rice Seedling ◽

Rice Seed ◽

Prime Mover ◽

Inclined Plate ◽

Depth Control ◽

Direct Seeded ◽

Field Efficiency

The agricultural operational holding in India is about 1.15 ha and 85.01 per cent belongs to marginal holdings (below 2 ha). This data shows an economic condition of the Indian farmer, which doesn’t allow him to adopt advanced agricultural machineries. Considering the situation of Indian farmer, we developed a prototype of three row self-propelled zero till direct seeded rice planter cum fertilizer applicator. This machine helps to plant a dry rice seed along with the fertilizer application with zero tillage condition. The machine includes inclined plate metering mechanism for seed; cup feed metering mechanism for fertilizer, seed cum fertilizer hopper, ground wheel, depth control wheels, inverted T furrow openers, 5 hp engine as a prime mover, power transmission system, adjustable handle, lever and rigid main frame to support all the parts and drive wheels. Machine is divided into two parts viz., prime mover part and planter cum fertilizer applicator part. Both parts can be separated from each other. The machine places the rice seed up to average depth of 25-40 mm and spacing between hills is observed to be 130-160 mm along with an average 20 cm of row spacing. The average field capacity at an average speed of 2.3 km.h-1 is observed to be 0.115 ha.h-1 for operating rice seeds. The field efficiency is observed to be 86.9 per cent. The operational cost is observed to be around 69.28 per cent less than the manual planting of rice seedling and also the man hour’s requirement is very less than the manual planting.

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Genome-wide association study and gene set analysis for understanding candidate genes involved in salt tolerance at the rice seedling stage

Molecular Genetics and Genomics ◽

10.1007/s00438-017-1354-9 ◽

2017 ◽

Vol 292 (6) ◽

pp. 1391-1403 ◽

Cited By ~ 13

Author(s):

Jie Yu ◽

Weiguo Zao ◽

Qiang He ◽

Tae-Sung Kim ◽

Yong-Jin Park

Keyword(s):

Salt Tolerance ◽

Association Study ◽

Candidate Genes ◽

Genome Wide Association Study ◽

Rice Seedling ◽

Seedling Stage ◽

Genome Wide Association ◽

Gene Set Analysis ◽

Gene Set ◽

Genome Wide

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Isolation and characterization of arsenic resistant soil bacteria and their effects on germination of rice under arsenic contamination

Research in Agriculture Livestock and Fisheries ◽

10.3329/ralf.v2i2.25003 ◽

2015 ◽

Vol 2 (2) ◽

pp. 229-237

Author(s):

Istiaq Ahmed ◽

Md Tofazzal Islam ◽

Md Akhter Hossain Chowdhury ◽

Md Kamruzzaman

Keyword(s):

Contaminated Soils ◽

Sodium Arsenite ◽

Agar Plate ◽

Rice Seedling ◽

Resistant Bacteria ◽

Gram Staining ◽

Isolation And Characterization ◽

Resistant Strains

This study was carried out to isolate, screen and characterize arsenic (As) resistant bacteria from As contaminated soils of Dumrakandi and Matlab under Faridpur and Chandpur districts and to evaluate their efficiency in reducing As toxicity against rice seedlings during germination. Thirteen strains were isolated from the soils which showed resistance to different levels of sodium arsenite (viz. 5, 10, 20 and 40 mM) in both agar plate and broth assay using BSMY I media. Among the isolates, BTL0011, BTL0012, BTL0015 and BTL0022 showed highest resistance to 40 mM sodium arsenite. Gram staining and KOH solubility test revealed that five strains were gram positive and rest eight was gram negative. They grew well in the liquid media at pH 5.5 to 8.5. In-vitro rice seedling bioassay with two superior isolates (BTL0011 and BTL0022) revealed that As resistant strains significantly enhanced seed germination of BRRI dhan29 and BRRI dhan47 at 60 ppm As. This study was laid out in CRD with three replications. The performance of BTL 0022 was superior to BTL0011. The overall results suggest that BTL0011 and BTL0022 can be used for bioremediation of As contaminated soils and to increase the germination and seedling growth of rice in As contaminated soils.Res. Agric., Livest. Fish.2(2): 229-237, August 2015

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Corrigendum to “Bioaccumulation of cadmium by Enterobacter sp. and enhancement of rice seedling growth under cadmium stress” [Ecotoxicol. Environ. Saf. 156 (2018) 183–196]

Ecotoxicology and Environmental Safety ◽

10.1016/j.ecoenv.2018.09.029 ◽

2018 ◽

Vol 165 ◽

pp. 672-673

Author(s):

Soumik Mitra ◽

Krishnendu Pramanik ◽

Anumita Sarkar ◽

Pallab Kumar Ghosh ◽

Tithi Soren ◽

...

Keyword(s):

Seedling Growth ◽

Cadmium Stress ◽

Rice Seedling

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Effects of Light Quality on the Chlorophyll Degradation Pathway in Rice Seedling Leaves

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha44210555 ◽

2016 ◽

Vol 44 (2) ◽

pp. 393-398

Author(s):

Chang-Chang CHEN ◽

Kuan-Hung LIN ◽

Meng-Yuan HUANG ◽

Wen-Dar HUANG ◽

Chi-Ming YANG

Keyword(s):

Light Quality ◽

Protoporphyrin Ix ◽

Degradation Pathway ◽

Photosynthetic Photon Flux Density ◽

Rice Seedling ◽

Photon Flux ◽

Photon Flux Density ◽

Rice Seedlings ◽

Rice Varieties ◽

Enriched Environments

The objective of this study was to investigate the dynamics of chlorophyll (Chl), biosynthetic intermediates (protoporphyrin IX, magnesium protoporphyrin IX, and protochlorophyllide), degradation intermediates [chlorophyllide (Chlide), pheophytin (Phe), and pheophorbide (Pho)], and carotenoids (Car) in leaves of rice seedlings. Two rice varieties, 'Taichung Shen 10' ('TCS10') and 'IR1552', were grown under different light quality conditions controlled by light emitting diodes (LED). Lighting treatments for rice seedlings were included by red (R), blue (B), green (G), and red + blue (RB), with fluorescent lighting (FL) as the control and photosynthetic photon flux density being set at 105 µmol m-2 s-1. The results show that lower levels of Chl and Car in leaves were detected under G lighting, and light quality did not mediate porphyrins in biosynthetic pathways. Rice seedling leaves took Chl→Phe→Pho and Chl→Chlide→Pho as the major and minor degradation routes, respectively. Furthermore, higher Phe/Chlide ratios were observed under G and FL lighting conditions, indicating that green-enriched environments can up-regulate the minor degradation route in leaves.

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