scholarly journals Molecular mechanism of crown root initiation and the different mechanisms between crown root and radicle in rice

2011 ◽  
Vol 6 (9) ◽  
pp. 1276-1278 ◽  
Author(s):  
Yuka Kitomi ◽  
Kitano Hidemi ◽  
Yoshiaki Inukai
Keyword(s):  
Molecular Mechanism ◽  
Root Initiation ◽  
Crown Root

scholarly journals Growth and yield of wheat (Triticum aestivum) under deficit irrigation

2014 ◽  
Vol 38 (4) ◽  
pp. 719-732 ◽  
Author(s):  
PK Sarkar ◽  
MSU Talukder ◽  
SK Biswas ◽  
A Khatun
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Deficit ◽  
Deficit Irrigation ◽  
Water Productivity ◽  
Root Initiation ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Crown Root ◽  
Initiation Stage

Timing and the extent of water deficit were studied in a field experiment on wheat (cv. Shatabdi) for three consecutive years from 2003-04 through 2005-06 at Jamalpur area. The effects of number and timing of irrigation application on yields were investigated under variable soil moisture condition in the root zone of different treatments. Eight deficit irrigations, including one no stress and one rainfed treatments were selected to subject the crop to various degrees of soil water deficit at different stages of crop growth. Measured amount of irrigation water was applied as per schedule prescribed for a particular treatment. Grain yield (GY), biomass, harvest index (HI), and water productivity (WP) were reasonably affected by deficit irrigation. Other yield contributing parameters like 1000-grain weight, grains/spike and spike, length were also affected by different levels of deficit irrigation. During grain formation stage, water deficit did not affect the grain yield but saved water significantly. Such water deficit treatments also shortened the grain maturation period. Differences in grain and straw yield among the stressed and no stress treatments are comparatively small, and statistically insignificant in some cases. The highest water productivity (2.02 kg/m3) was observed in treatment which was irrigated only once at crown root initiation stage (T2) although the yield was comparatively low. The CRI (crown root initiation) stage was found the most sensitive to water stress. Water stress at vegetative stage also reduced the yield considerably. DOI: http://dx.doi.org/10.3329/bjar.v38i4.19663 Bangladesh J. Agril. Res. 38(4): 719-732, December 2013

scholarly journals Transcriptome profiling of laser-captured crown root primordia reveals new pathways activated during early stages of crown root formation in rice

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0238736
Author(s):  
Jérémy Lavarenne ◽  
Mathieu Gonin ◽  
Antony Champion ◽  
Marie Javelle ◽  
Hélène Adam ◽  
...  
Keyword(s):  
Root Formation ◽  
Developmental Stages ◽  
Transcriptome Profiling ◽  
Rice Root ◽  
Primary Data ◽  
Root Initiation ◽  
Root Primordia ◽  
Data Resource ◽  
Crown Root ◽  
Crown Roots

Crown roots constitute the main part of the rice root system. Several key genes involved in crown root initiation and development have been identified by functional genomics approaches. Nevertheless, these approaches are impaired by functional redundancy and mutant lethality. To overcome these limitations, organ targeted transcriptome analysis can help to identify genes involved in crown root formation and early development. In this study, we generated an atlas of genes expressed in developing crown root primordia in comparison with adjacent stem cortical tissue at three different developmental stages before emergence, using laser capture microdissection. We identified 3975 genes differentially expressed in crown root primordia. About 30% of them were expressed at the three developmental stages, whereas 10.5%, 19.5% and 12.8% were specifically expressed at the early, intermediate and late stages, respectively. Sorting them by functional ontology highlighted an active transcriptional switch during the process of crown root primordia formation. Cross-analysis with other rice root development-related datasets revealed genes encoding transcription factors, chromatin remodeling factors, peptide growth factors, and cell wall remodeling enzymes that are likely to play a key role during crown root primordia formation. This atlas constitutes an open primary data resource for further studies on the regulation of crown root initiation and development.

scholarly journals Nitrogen management in zero-tillage cum surface seeded wheat at Rampur, Chitwan, Nepal

2013 ◽  
Vol 1 ◽  
pp. 85-93
Author(s):  
KR Dahal ◽  
BB Adhikari ◽  
KB Basnet
Keyword(s):  
Soil Moisture ◽  
Grain Yield ◽  
Nitrogen Management ◽  
Wheat Crop ◽  
Root Initiation ◽  
Zero Tillage ◽  
Nitrogen Application ◽  
Crown Root ◽  
Stage 1 ◽  
Animal Sciences

An experiment was conducted at the experiment field of the Institute of Agriculture and Animal Sciences, Rampur, Chitwan, Nepal in 1999/2000 to assess the effect of mulch and the timing of nitrogen application on the performance of surface seeded wheat crop under zero-tillage condition. The experiment consisted of eight treatments that included 1/2 dose of N at sowing and 1/2 at crown root initiation (CRI) stage; 1/2 dose of N at 11 days after sowing and 1/2 at CRI; whole dose of N at CRI stage; and 1/2 dose of N at CRI and 1/2 40 days after sowing, with and without mulch using rice straw @ 4 ton/ha. The result showed that mulch was effective in conserving soil moisture, suppressing weeds and enhancing yield and yield attributing parameters. Similarly, application of nitrogen at two splits i.e. 1/2 dose of N at CRI and 1/2 at 40 days after sowing with mulch produced significantly higher grain yield (4547 kg/ha) whereas significantly lower grain yield (2267 kg/ha) was obtained from the treatment of 1/2 dose of N at sowing and 1/2 at CRI without mulch. DOI: http://dx.doi.org/10.3126/ajn.v1i0.7547 Agronomy Journal of Nepal (Agron JN) Vol. 1: 2010 pp.85-93

scholarly journals Molecular mechanisms of crown root initiation in rice

Root Research ◽  
2011 ◽  
Vol 20 (2) ◽  
pp. 61-71
Author(s):  
Yuka Kitomi ◽  
Yoshiaki Inukai
Keyword(s):  
Molecular Mechanisms ◽  
Root Initiation ◽  
Crown Root

Influence of rates and methods of manganese application on yield and nutrition of wheat in a reclaimed sodic soil

1996 ◽  
Vol 127 (4) ◽  
pp. 433-439 ◽  
Author(s):  
M. L. Soni ◽  
A. Swarup ◽  
M. Singh
Keyword(s):  
Grain Yield ◽  
Significant Positive Correlation ◽  
Foliar Spray ◽  
Root Initiation ◽  
Exchangeable Sodium ◽  
Sodic Soil ◽  
Straw Yield ◽  
Crown Root ◽  
Mn Content ◽  
1000 Grain Weight

SUMMARYA field experiment was conducted at the experimental farm of the Central Soil Salinity Research Institute, Karnal, India during 1992/93 to evaluate the effects of rates and methods of manganese application on the yield and nutrition of wheat on a reclaimed and intensively cropped Mn-deficient sodic soil (pH = 8·7, exchangeable sodium percentage = 18 and DTPA-extractable Mn = 2·7 mg kg-1). There were eight treatments which consisted of a control (no Mn application), three rates of 25, 50 and 100 kg MnSO4. H2O ha-1 each either as a basal or a top-dressing at first irrigation or a foliar spray of 1·0% MnSO4.H2O at crown root initiation (CRI), tillering and jointing stages. Grain and straw yield of wheat increased significantly with increasing rates of Mn application. A foliar spray of Mn produced a significantly higher yield than 25 and 50 kg MnSO4. H2O ha-1 applied either as a basal or a top-dressing but similar to that from 100 kg MnSO4.H2O ha-1. Efficiency of Mn was higher with a foliar spray (82·6 kg grain kg-1 Mn) than with soil application (4·4–6·4 kg grain kg-1 Mn). Application of Mn increased its concentration in the crop but decreased Fe and Cu crop concentrations. Grain yield had a significant positive correlation with the Mn content of the grain (r = 0·72) and straw (r = 0·78). Grain yield was positively correlated with 1000-grain weight (r = 0·90). Recovery of applied Mn ranged from 28·1 to 33·0%.

scholarly journals Effect of foliar application of zinc on yield of wheat grown by avoiding irrigation at different growth stages

2016 ◽  
Vol 41 (2) ◽  
pp. 323-334 ◽  
Author(s):  
S Sultana ◽  
HM Naser ◽  
NC Shil ◽  
S Akhter ◽  
RA Begum
Keyword(s):  
Yield Components ◽  
Foliar Application ◽  
Growth And Yield ◽  
Optimum Dose ◽  
Growth Stages ◽  
Root Initiation ◽  
Crown Root ◽  
Yield And Yield Components ◽  
Different Growth Stages ◽  
Heading Stage

A field experiment was carried out at micronutrient experimental field of Soil Science Division, BARI, Joydebpur, Gazipur to study the effect of foliar application of zinc on yield of wheat (BARI gom-25) grown by skipping irrigation at different growth stages of the crop. The experiment was designed in a split plot design on sixteen treatments comprising four irrigation treatments (regular irrigation, skipped irrigation at crown root initiation, skipped irrigation at booting stage and skipped irrigation at grain filling stages of wheat growth) and four foliar application of zinc (0.0%, 0.02%, 0.04% and 0.06% of zinc). Zinc Sulphate Monohydrate (ZnSO4. H2O) was used as a source of Zn. The interaction effect of irrigation and foliar application of zinc significantly influenced the yield and yield components of wheat. The highest yield (5.59 t ha-1) was recorded in normal irrigation which was identical with skipping irrigation at flowering and heading stage with 0.06% foliar application of zinc. Skipping irrigation at crown root initiation stage had the most negative effect on growth and yield. Skipping irrigation at flowering and heading stage of wheat with 0.04% foliar application of zinc gave the identical yield in regular irrigation with 0.04% and 0.06% foliar application of zinc. Thus, foliar application of zinc played a major role on yield and yield components of wheat at later stages of growth. The response of foliar application of Zn was positive and quadrate in nature. The optimum dose was appeared as 0.04% foliar application of zinc for grain yield of wheat in the study area of Joydebpur, Gazipur (AEZ-28).Bangladesh J. Agril. Res. 41(2): 323-334, June 2016

scholarly journals Effect of foliar application of iron and zinc on nutrient uptake and grain yield of wheat under different irrigation regimes

2018 ◽  
Vol 43 (3) ◽  
pp. 395-406 ◽  
Author(s):  
S Sultana ◽  
HM Naser ◽  
MA Quddus ◽  
NC Shill ◽  
MA Hossain
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Foliar Application ◽  
Grain Filling ◽  
Root Initiation ◽  
Crown Root ◽  
Filling Stage ◽  
Water Stress Condition ◽  
Iron And Zinc ◽  
Grain Filling Stage

A field experiment was carried out to study the zinc-iron relationship in wheat (BARI Gom-26) plant grown under water stress condition in the field near net house of Soil Science Division, BARI, Joydebpur, Gazipur, during November 2015 to March 2016. The experiment was designed in a split plot on sixteen treatments comprising four irrigation treatments (regular irrigation, stopping irrigation at crown root initiation, stopping irrigation at booting stage and stopping irrigation at grain filling stage) and four foliar application of zinc and iron (control, 0.05% of zinc, 0.05% of iron and 0.05% of zinc +0.05% of iron). Zinc sulphate monohydrate (ZnSO4. H2O) and ferrous sulphate (FeSO4. H2O) were used as a source of Zn and Fe. The highest yield (4.01 t ha-1) was recorded in stopping irrigation at grain filling stage which was identical with regular irrigation. Water stress at crown root initiation stage had the most negative effect on growth and yield. Foliar application of zinc and iron played a major role on yield and yield components of wheat at later stages of growth. The results obtained from the present research showed that iron and zinc spray increased grain yield and quality of wheat and improved the effects caused by drought stress.Bangladesh J. Agril. Res. 43(3): 395-406, September 2018

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