scholarly journals A Comparative Study on Root Traits of Spring and Winter Canola (Brassica napus L.) under Controlled and Water Stressed Conditions

2017 ◽  
Vol 9 (7) ◽  
pp. 58 ◽  
Author(s):  
Muhammad Arif Uz Zaman ◽  
Mukhlesur Rahman
Keyword(s):  
Root Growth ◽  
Primary Root ◽  
Root Traits ◽  
Dry Weight ◽  
Growth Reduction ◽  
Brassica Napus L ◽  
Winter Type ◽  
Root Parameters ◽  
Root Growth Reduction ◽  
Root Vigor

Root system in canola (Brassica napus L.) varies largely in different growth habit types. A study was conducted with five winter and five spring types of canola germplasm. The objective was to identify the gradual change of root traits at different growth habits stages under controlled and water stressed conditions. Two experiments, controlled and water stressed, were conducted in a greenhouse. Data on different root traits were collected at 30, 40, 50 and 60 days after planting. In controlled experiment, no significant difference was observed for root traits between winter and spring types at 30 days after planting. However, significant variations were appeared for taproot length (F = 10.17***) and root dry weight (F = 16.96***) between winter and spring types at 40 days after planting. All other root parameters such as basal taproot diameter (F = 22.14***), bottom taproot diameter (F = 4.59*), primary root branches (F = 78.70***) and root vigor (F = 47.18***) were significantly higher in the winter types compared to those of the spring types at 60 days after planting. Growth pattern curves indicated that all the root traits of spring types increased in a steady fashion, where the root traits of winter types increased rapidly after 40 days of planting. In water stressed experiment, the water stress was applied from 20 to 60 days after planting, and data was taken at 60 days after planting. All the root parameters except taproot length were significantly (P < 0.001) lower in the stressed spring and winter plants compared to the control plants. The root growth reduction in stressed winter type germplasms was higher. Basal taproot diameter, bottom taproot diameter, primary root branches, root vigor, and root dry weight were decreased by 43%, 63%, 19%, 31% and 53%, respectively in stressed winter type plants. In contrast, the root growth reduction of the spring type germplasms were relatively lower. This study indicated that winter type canola generates vigorous root system in comparison to spring types under normal growing conditions, but ceases its root growth rate more than the spring types under water stressed conditions.

scholarly journals Genetic Variability in Root and Shoot Growth Characteristics of Peanut1,2

1982 ◽  
Vol 9 (2) ◽  
pp. 68-72 ◽  
Author(s):  
D. L. Ketring ◽  
W. R. Jordan ◽  
O. D. Smith ◽  
C. E. Simpson
Keyword(s):  
Root Growth ◽  
Leaf Area ◽  
Root Length ◽  
Shoot Growth ◽  
Primary Root ◽  
Positive Association ◽  
Dry Weight ◽  
Root Parameters ◽  
Shoot Dry Weight ◽  
Highly Correlated

Abstract The shape and extent of root systems influence the rate and pattern of nutrient and water uptake from the soil. In dicotyledons such as peanut (Arachis hypogaea L.), the primary root and its laterals constitute the main root system. Rooting trait differences in some crops have been associated with drought tolerance. Our objective in this study was to determine if variation in root length and number occurs among peanut genotypes. In one test, shoot and root growth of 23 genotypes (12 spanish and 11 virginia types) were compared in the greenhouse at 55 days after planting using clear acrylic tubes 7.5 cm in diameter and 2.2 m in length. Shoot dry weight, leaf area, tap root length, and root number at 1 m depth ranged for spanish-type entries from 1.23 to 2.65 g, 214 to 409 cm2, 95.0 to 186.8 cm, and 1.0 to 3.1, respectively. Similarly, ranges for virginia-type entries were 1.35 to 3.23 g, 135 to 460 cm2, 122.4 to 192.6 cm, and 1.0 to 7.1. Correlations between shoot and root parameters indicated strong positive association between aerial and subterranean growth. However, the relationship of leaf area to root length was stronger for virginia- than for spanish-type entries. Root length and numbers were highly correlated for spanish, but not for virginia entries. In other tests that included two each of virginia-, spanish-, and valencia-type entries, similar results were found for plants at 34 and 47 days after planting. Significant differences in both root (length and numbers) and shoot growth (dry weight and leaf area) were found among the genotypes tested. Inherent differences in root growth rate were evident at early stages of seedling growth. The results from this sample of peanut germplasm indicate that there is considerable diversity in root growth and there is high shoot/root growth association.

scholarly journals Root growth of four transplant Aman rice varieties as influenced by NPKS fertilizer

1970 ◽  
Vol 6 (2) ◽  
pp. 235-238 ◽  
Author(s):  
NC Pal ◽  
MAR Sarkar ◽  
MZ Hossain ◽  
SC Barman
Keyword(s):  
Root Growth ◽  
Interaction Effect ◽  
Dry Weight ◽  
Plant Part ◽  
Fresh Weight ◽  
Rice Varieties ◽  
Root Parameters ◽  
Four Levels ◽  
High Level ◽  
Plot Design

An experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during July to December 2006 to study the root growth of four Transplant Aman rice varieties as influenced by NPKS fertilization. The experiment was laid out in a split-plot design with three replications. The experiment consisted of four varieties viz. BRRI dhan30, BRRI dhan31, BRRI dhan40 and BRRI dhan41; and four levels of fertilizers viz. 0, 50%, 100% and 150% of the recommended dose of NPKS. BRRI dhan41 had better performance in all root parameters. All root parameters except number of roots hill-1 performed better at high level of fertilizer. The interaction effect between variety and fertilizer level was significant in respect of number of roots hill-1, fresh weight of root (except at 30 days after transplanting (DAT) and 90 DAT), dry weight of root, fresh weight of above ground plant part (except at 30 DAT and 90 DAT) and dry weight of above ground plant part (except at 90 DAT). Keywords: Root growth; Rice varieties; NPKS fertilizer DOI: 10.3329/jbau.v6i2.4816 J. Bangladesh Agril. Univ. 6(2): 235-238, 2008

Osmotic stress induced root growth and regulation of root development related genes in progenitors of wheat

2020 ◽  
Vol 80 (03) ◽  
Author(s):  
Monika Dalal ◽  
Sneha Tiwari ◽  
Vinod .
Keyword(s):  
Osmotic Stress ◽  
Root Growth ◽  
Root Length ◽  
Molecular Genetic ◽  
Aegilops Tauschii ◽  
Primary Root ◽  
Root Traits ◽  
Aegilops Speltoides ◽  
Good Resource ◽  
Primary Root Length

Maintenance of root growth during water deficit can significantly contribute to yield stability. In this study, total nine accessions, three each of Triticum monococcum, Aegilops speltoides and Aegilops tauschii were analysed for root traits under two levels of osmotic stress at seedling stage. T. monococcum accession (A2) showed highest increase in total root growth while 17% and 34% increase in primary root length was recorded in T. monococcum (A2) and Ae. speltoides (B3) under osmotic stress. Expression of BREVIS RADIX (BRX) and NAM/ATAF/CUC 1(NAC1) was analysed in three diploid accessions with contrasting root phenotype. BREVIS RADIX, a transcription factor modulating root length was up regulated in T. monococcum A2 accession while NAC1 expression was up regulated in three of the accessions under osmotic stress. The accessions and genes analysed in the study can be good resource to explore the molecular-genetic mechanism of root growth under stress.

scholarly journals Temporal dynamics of the response to Al stress in Eucalyptus grandis × Eucalyptus camaldulensis

2015 ◽  
Vol 87 (2) ◽  
pp. 1063-1070 ◽  
Author(s):  
Berenice K. de Alcântara ◽  
Daniel Pizzaia ◽  
Fernando A. Piotto ◽  
Lucélia Borgo ◽  
Gilvano E. Brondani ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Root Growth ◽  
Root Elongation ◽  
Temporal Dynamics ◽  
Eucalyptus Grandis ◽  
Eucalyptus Camaldulensis ◽  
Growth Reduction ◽  
Al Tolerance ◽  
Acidic Soils ◽  
Root Growth Reduction

Lipid peroxidation and root elongation of Eucalyptus grandis × Eucalyptus camaldulensis were studied under stress conditions in response to aluminum (Al), a metal known to limit agricultural productivity in acidic soils primarily due to reduced root elongation. In Brazil, the Grancam 1277 hybrid (E. grandis × E. camaldulensis) has been planted in the "Cerrado", a region of the country with a wide occurrence of acidic soils. The present study demonstrated that the hybrid exhibited root growth reduction and increased levels of lipid peroxidation after 24h of treatment with 100 µM of Al, which was followed by a reduction in lipid peroxidation levels and the recovery of root elongation after 48h of Al exposure, suggesting a rapid response to the early stressful conditions induced by Al. The understanding of the temporal dynamics of Al tolerance may be useful for selecting more tolerant genotypes and for identifying genes of interest for applications in bioengineering.

scholarly journals Omeprazole Enhances Mechanical Stress-Induced Root Growth Reduction in Arabidopsis thaliana

2018 ◽  
Vol 59 (8) ◽  
pp. 1581-1591 ◽  
Author(s):  
Takashi Okamoto ◽  
Shogo Takatani ◽  
Yoshiteru Noutoshi ◽  
Hiroyasu Motose ◽  
Taku Takahashi
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Mechanical Stress ◽  
Growth Reduction ◽  
Root Growth Reduction

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 Foliar Auxin Application Improves Adventitious Rooting of Wall Germander Cuttings

2018 ◽  
Vol 28 (1) ◽  
pp. 17-21 ◽  
Author(s):  
Benjamin D. Taylor ◽  
Benjamin K. Hoover
Keyword(s):  
Root Growth ◽  
Primary Root ◽  
Foliar Spray ◽  
Dry Weight ◽  
Adventitious Rooting ◽  
Root Area ◽  
Spray Method ◽  
Adventitious Root Development ◽  
Teucrium Chamaedrys ◽  
Spray Treatment

Indole-3-butyric acid (IBA) is frequently used to promote adventitious root development in plant propagation from cuttings. We evaluated the effects of 0, 1000, or 3000 ppm IBA applied as a liquid foliar spray or talc-based basal dip on adventitious rooting of wall germander (Teucrium chamaedrys) cuttings. An initial experiment was conducted in Fall 2016, followed by a replication in Spring 2017. Two-dimensional root area, primary root count, root dry weight, and a rooting index (0 to 5 scale) were assessed as measures of root growth. By all metrics and for both experiments, cuttings benefited from IBA application and exhibited equal or greater root growth after the foliar spray treatment compared with the talc dip. In both experiments and for all metrics, the talc dip method achieved no greater root growth at 3000 ppm IBA than the foliar spray method at 1000 ppm IBA. These results suggest that for wall germander, IBA application by the foliar spray method is equal or superior to the talc dip method presently in widespread use in the horticulture industry.

Genetic variation for rate of establishment in caucasian clover

1998 ◽  
pp. 213-217
Author(s):  
K.H. Widdup ◽  
T.L. Knight ◽  
C.J. Waters
Keyword(s):  
Genetic Variation ◽  
Root Growth ◽  
Seedling Growth ◽  
White Clover ◽  
Seedling Emergence ◽  
Red Clover ◽  
Dry Weight ◽  
Cool Season ◽  
Trifolium Ambiguum ◽  
Root Dry Weight

Slow establishment of caucasian clover (Trifolium ambiguum L.) is hindering the use of this legume in pasture mixtures. Improved genetic material is one strategy of correcting the problem. Newly harvested seed of hexaploid caucasian clover germplasm covering a range of origins, together with white and red clover and lucerne, were sown in 1 m rows in a Wakanui soil at Lincoln in November 1995. After 21 days, the caucasian clover material as a group had similar numbers of emerged seedlings as white clover and lucerne, but was inferior to red clover. There was wide variation among caucasian clover lines (48-70% seedling emergence), with the cool-season selection from cv. Monaro ranked the highest. Recurrent selection at low temperatures could be used to select material with improved rates of seedling emergence. Red clover and lucerne seedlings produced significantly greater shoot and root dry weight than caucasian and white clover seedlings. Initially, caucasian clover seedlings partitioned 1:1 shoot to root dry weight compared with 3:1 for white clover. After 2 months, caucasian clover seedlings had similar shoot growth but 3 times the root growth of white clover. Between 2 and 5 months, caucasian clover partitioned more to root and rhizome growth, resulting in a 0.3:1 shoot:root ratio compared with 2:1 for white clover. Both clover species had similar total dry weight after 5 months. Unhindered root/ rhizome devel-opment is very important to hasten the establishment phase of caucasian clover. The caucasian clover lines KZ3 and cool-season, both selections from Monaro, developed seedlings with greater shoot and root growth than cv. Monaro. KZ3 continued to produce greater root growth after 5 months, indicating the genetic potential for improvement in seedling growth rate. Different pasture estab-lishment techniques are proposed that take account of the seedling growth characteristics of caucasian clover. Keywords: establishment, genetic variation, growth, seedling emergence, Trifolium ambiguum

Sign in / Sign up

Export Citation Format

Share Document