scholarly journals The relationship between characteristics of root morphology and grain filling in wheat under drought stress

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12015
Author(s):  
Xinyu Chen ◽  
Yu Zhu ◽  
Yuan Ding ◽  
Rumo Pan ◽  
Wenyuan Shen ◽  
...  
Keyword(s):  
Drought Stress ◽  
Root Growth ◽  
Plant Height ◽  
Root Length ◽  
Dry Weight ◽  
Starch Accumulation ◽  
Protein Accumulation ◽  
Maturity Stage ◽  
Root Dry Weight ◽  
The Relationship

Drought is a common yield limiting factor in wheat production and has become a significant threat to global food security. Root system is the organ responsible for water uptake from soil and root growth is closely associated with yield and quality of wheat. However, the relationship between morphological and structural characteristics of root growth and caryopsis enrichment in wheat under drought stress is unclear. In this study, two wheat cultivars (YM13 and YN19) were treated with drought from flowering to caryopsis maturity stage. The changes in morphological structure of roots and characteristics of endosperm enrichment were investigated. Drought stress significantly reduced the root length, plant height, root dry weight and aboveground parts dry weight, whereas the root-shoot ratio of YM13 and YN19 increased by 17.65% and 8.33% under drought stress, respectively. The spike length, spike weight, grains number per spike and 1,000-grains weight of mature wheat also significantly declined under drought stress. Meanwhile, the cross section structure of roots was changed with the enlargement of vascular cylinder and dense distribution of xylem vessels under drought stress. Additionally, drought stress affected the substance enrichment in wheat caryopses, decreasing starch accumulation and increasing protein accumulation of endosperm. Correlation analysis suggested that the root length was closely correlated with the relative areas of amyloplast (0.51) and protein body (0.70), and drought stress increased the correlation coefficient (0.79 and 0.78, respectively). While the root dry weight had a significantly positive correlation with the plant height and aboveground parts dry weight. The results can provide theoretical basis for root architecture optimization, water-saving and high-yield cultivation and quality improvement in wheat.

scholarly journals Respon Pertumbuhan Kelapa Sawit (Elaeis Guineensis Jacq.) Varietas Dyxp Dumpy pada Kondisi Stres Air di Pembibitan Awal

2018 ◽  
Vol 3 (1) ◽  
pp. 17
Author(s):  
Wagino Wagino ◽  
Sri Murti Tarigan ◽  
Eka Bobby Febrianto
Keyword(s):  
Plant Height ◽  
Oil Palm ◽  
Root Length ◽  
Stomatal Density ◽  
Block Design ◽  
Dry Weight ◽  
Base Diameter ◽  
Root Volume ◽  
Root Dry Weight ◽  
Wet Weight

<p>Global climate exchange especially rainfallspurs the growth of oil palm adapt to environmental conditions, so the development of oil palm plantations requires seeds that are able to adapt well in drought conditions.This study aims to determine whether water stress affects the growth of oil palm seedlings and sees the response of the level of resistance of oil palm seeds to drought stress.This research was carried out in the greenhouse garden experiment Medan STIPAP was conducted from January to June 2018. This study used Non-factorial Randomized Block Design (RBD), which consisted of 3 levels, 3 samples and 3 replications. Parameters to be observed were plant height, stem base diameter, leaf number, root wet weight, root dry weight, plant wet weight, plant dry weight, root volume, root length, stomatal density and number of stomata.The results showed that the difference in giving A1 water (100%) was significantly different from A2 (60%) and A3 (20%) on the parameters of oil palm seedling growth especially for the parameters of plant height, root wet weight, root dry weight, plant wet weight, plant dry weight, root volume, and root length while the base diameter of the stem, number of leaves, stomatal density and number of stomata give no significant effect. Drought stress effected to reduce the growth of stem diameter.</p>

Effect of Rhizobium inoculation to nodulation and growth of soybean [Glycine max (L.) Merrill] Germplasm

2018 ◽  
Author(s):  
Sakka Samudin ◽  
Heru Kuswantoro
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Root Nodules ◽  
Dry Weight ◽  
Limiting Factor ◽  
Rhizobium Inoculation ◽  
Root Dry Weight ◽  
Shoot Dry Weight ◽  
Glycine Max L ◽  
Inoculation Treatment

Nitrogen is an important macronutrient mineral that is needed in the largest amount by the plant and is the main limiting factor for plant development. Rhizobium is a group of bacteria capable of providing nutrients for soybean crops. When symbiotic with legume crops, this group of bacteria is able to infect plant roots and form root nodules. The study aimed to investigate the effect of Rhizobium on nodulation and growth of some soybean germplasm. The results showed no interaction between the inoculation treatment and the genotype. The significant effect of inoculation was shown by the number of nodules, nodule dry weight, root length, and root dry weight. Inoculation did not affect plant height and shoot dry weight. These traits were more influenced by genetic factors. In the condition without inoculation, the root length was higher but the root dry weight was lower. Plant height differed between the genotypes. KPT5 and KPT6 showed the highest plant height than any other genotypes. Both genotypes also had the highest shoot dry weight. The highest shoot dry weight was also achieved by KPT4.

Phosphorus efficiency in pasture species. VII. Relationships between yield and P uptake in two accessions of white clover

1991 ◽  
Vol 42 (7) ◽  
pp. 1271 ◽  
Author(s):  
GJ Blair ◽  
DC Godwin
Keyword(s):  
Root Growth ◽  
White Clover ◽  
Root Length ◽  
Dry Weight ◽  
Application Rate ◽  
P Uptake ◽  
Extension Rate ◽  
Root Extension ◽  
Root Dry Weight ◽  
P Application

Lack of data on root growth and relationships between root parameters and P uptake are major limitations to understanding and modelling P efficiency in crop and forage plants. An experiment was conducted whereby two accessions of white clover (Trifolium repens, Chiswick and Ladino) were grown in pots in a P deficient soil fertilized with a low (P5 [kg ha-1]) or high (P40) P application rate. Plants were harvested at 10, 16, 22, 28, 34 and 40 days after transplanting and tops harvested and roots recovered from the pots. Detailed measures of root members were made at 10, 16 and 22 days and these correlated with P uptake. Dry weight of tops of accessions was the same between the two rates of P until day 28. At 40 days, the tops yield of Ladino was higher than Chiswick at P40. Root dry weight increased with increasing P application rate and time from day 16 onwards. Significant differences in root growth only occurred at the 16 and 34 day harvests at P5. Ladino tended to have a greater mean P uptake over time than did Chiswick at both P levels. P uptake was found to be positively correlated with shoot and root dry weight, root length, root number, root volume and surface area, and negatively correlated with mean root diameter and mean length per root. Root extension rate at low P in Ladino was greater than that in Chiswick, which may explain the greater P uptake by Ladino at low P at later harvests in this experiment. The changes in length, diameter and number of roots in the two accessions examined in this study, with time, in response to P, reflect some form of coordination. Chiswick tended to produce many short roots whilst Ladino fewer long roots. Only small differences in P uptake per unit root length were measured, which suggest that total root length or root extension rate is the primary determinant of total P uptake in these accessions of white clover.

Water relations of winter wheat: 1. Growth of the root system

1978 ◽  
Vol 91 (1) ◽  
pp. 91-102 ◽  
Author(s):  
P. J. Gregory ◽  
M. McGowan ◽  
P. V. Biscoe ◽  
B. Hunter
Keyword(s):  
Winter Wheat ◽  
Root Growth ◽  
Root System ◽  
Water Relations ◽  
Root Length ◽  
Dry Weight ◽  
Growing Season ◽  
Main Stem ◽  
Soil Cores ◽  
Root Dry Weight

SummaryThe production of root axes and the growth of the root system are reported for a commercially grown crop of Maris Huntsman winter wheat. Soil cores were extracted on 17 occasions during the growing season permitting a detailed study of root length and root dry weight with depth and time.Production of seminal root axes was complete by the beginning of March when all plants possessed six (occasionally seven) axes which persisted throughout the life of the crop. Nodal axes were produced continuously from mid-February until late May and finally numbered approximately 20 stem nodal axes per main stem. Total root dry weight increased exponentially until the beginning of April and then almost linearly to reach a maximum of 105 g root/m2 field in mid-June (anthesis). After anthesis, total root dry weight decreased but root growth continued below 80 cm. From April onwards, approximately 65% of the total root dry weight was in the 0–30 cm layer.

scholarly journals The Influence of Microbia Time and Types of PGPR on Growth of Soybean Plant (Glycine Max Meril) on Vegetative Phase

2020 ◽  
Vol 2 (2) ◽  
pp. 594-598
Author(s):  
Bukhari ◽  
Rudi Fadhli ◽  
Nuryulsen Safridar
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Root Nodules ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soybean Plant ◽  
Fresh Weight ◽  
Root Dry Weight ◽  
Randomized Design ◽  
Time Of Administration

This research was conducted in the Experimental Garden of the Faculty of Agriculture, Jabal Ghafur Glee Gapui University, Pidie Regency, which took place from September 16 to November 15, 2017. This study used a Completely Randomized Design (CRD) of 2 x 3 with 3 replications. The time factor for administration consists of 2 levels : W1 (Pagi), W2 (Sore). Plant Growth Promoting Rhizobacteria (PGPR) type factors consist of three levels: P1 (Rhizobium), P2 (Mikoriza), P3 (Mikoriza +  Rhizobium). Parameters observed in soybean plant components include: plant height at ages 15, 30 and 45 HST, root fresh weight, root dry weight, number of nodulations. The difference in the time of administration of PGPR has a very significant effect on root dry weight, but it does not significantly affect the height of plants aged 15, 30 and 45 HST, root fresh weight, root length and number of root nodules, the best treatment was encountered at the time of administration of PGPR W2 (Afternoon ). Different types of PGPR have very significant effect on root length and number of nodulations, but no significant effect on plant height aged 15, 30 and 45 HST, root fresh weight and root dry weight. The best treatment was found in the treatment P1 (Rhizobium). There was no interaction between the time of administration of the PGPR and the type of PGPR against all observed parameters.

scholarly journals 227 Rate of Root Growth of Three Woody Ornamental Species

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 430B-430
Author(s):  
Amy N. Wright ◽  
Stuart L. Warren ◽  
Frank A. Blazich
Keyword(s):  
Root Growth ◽  
Leaf Area ◽  
Root Length ◽  
Dry Weight ◽  
Root Dry Weight ◽  
Root Area ◽  
Rate Of Increase ◽  
Bare Root ◽  
Mountain Laurel ◽  
Ornamental Species

Root growth is a critical factor in landscape establishment of container-grown woody ornamental species. Kalmia latifolia (mountain laurel) often does not survive transplanting from containers into the landscape. The objective of this experiment was to compare rate of root growth of mountain laurel to that of Ilex crenata `Compacta' (`Compacta' holly) and Oxydendrum arboreum (sourwood). Six-month-old tissue-cultured liners (substrate intact) of mountain laurel, 1-year-old rooted cutting liners (substrate intact) of `Compacta' holly (liner holly), 6-inch bare root seedling liners of sourwood, and 3-month-old bare-root rooted cuttings of `Compacta' holly were potted in containers in Turface™. Prior to potting, roots of all plants were dyed with a solution of 0.5% (w/v) methylene blue. Plants were greenhouse-grown. Destructive harvests were conducted every 2 to 3 weeks (six total harvests). Length, area, and dry weight of roots produced since the start of the experiment, leaf area, and dry weight of shoots were measured. Sourwood and liner holly had greater rate of increase in root length and root dry weight than mountain laurel and bare root holly. Rate of increase in root area was greatest for sourwood, followed by (in decreasing order) liner holly, mountain laurel, and bare-root holly. Increase in root length and root area per increase in leaf area was highest for liner holly, possibly indicating why this species routinely establishes successfully in the landscape. Increase in root dry weight per increase in shoot dry weight was lowest for mountain laurel. The slow rate of root growth of mountain laurel (compared to sourwood and liner holly) may suggest why this species often does not survive transplanting.

scholarly journals Screening of Rice Genotypes Based on Root Growth for Salt Tolerance at Germination Stage

2017 ◽  
Vol 10 (1) ◽  
pp. 45-53
Author(s):  
DE Jharna ◽  
MA Hossain ◽  
BLD Chowdhury ◽  
MAA Lita ◽  
MM Islam
Keyword(s):  
Root Growth ◽  
Root Length ◽  
Petri Dish ◽  
Dry Weight ◽  
Salt Tolerant ◽  
Coastal Regions ◽  
Rice Genotypes ◽  
Induced Changes ◽  
The Relationship ◽  
Germination Stage

Salinity induced changes in root length and weight under salt tolerant condition. To examine the effect of different degrees of salinity on the root growth of rice, a total of 127 rice genotypes including mostly traditional, cultivated in the coastal regions of Bangladesh and some improved genotypes were used in the study. The study was conducted in petri dish providing 0, 6, 9, 12 and 15 dS m-1 (deci Siemens) salinity. Based on the performances, genotypes were scored and grouped as highly tolerant (score 1), tolerant (score 3), moderately tolerant (score 5), susceptible (score 7) and highly susceptible (score 9). Salinity stress reduced the root length and weight of rice genotypes. But the extent of root length and weight, varied with genotypes and levels of salinity. Generally in control condition root length and weight was found higher and it gradually decreased with increasing salt concentration. Based on decrease of root dry weight at 15 dS m-1 salinity, 8 genotypes scored 1, 28 scored 3, 40 scored 5, 35 scored 7, and 16 scored 9. Regarding root length, 14 genotypes were found highly tolerant, 18 were tolerant, 27 moderately tolerant, 38 susceptible and 30 were highly susceptible. Based on the score, the relationship between salinity level and tolerances of the different rice genotypes can be understood.J. Environ. Sci. & Natural Resources, 10(1): 45-53 2017

scholarly journals ROOT GROWTH OF MAGNOLIA GRANDIFLORA HORT, `ST, MARY AFTER EXPOSURE TO ROOT-ZONE TEMPERATURE TREATMENTS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1080g-1080
Author(s):  
Chris A. Martin ◽  
Dewayne L. Ingram
Keyword(s):  
Root Growth ◽  
Treatment Period ◽  
Root Length ◽  
Root Zone ◽  
Dry Weight ◽  
Total Root Length ◽  
Root Zone Temperature ◽  
Magnolia Grandiflora ◽  
Root Dry Weight ◽  
Zone Temperature

Root growth of Magnolia grandiflora Hort. `St. Mary' was studied for 16 wk after an 8-wk exposure period to 30°, 34°, 38°, or 42°±0.8°C root-zone temperature (RZT) treatments applied 6 hr daily, Immediately after the RZT treatment period, total root length was similar for trees exposed to 30°, 34°, and 38°C and was reduced 45% at 42° compared to 38°C. For weeks eight and 18 of the post-treatment period, response of total root length to RZT was linear. Total root length of trees exposed to 28°C was 247% and 225% greater than those exposed to 42°C RZT at week eight and 16, respectively. Root dry weight from the 42°C RZT treatment was 29% and 48% less than 38° and 34°C RZT treatment, respectively, at week eight. By week 16, root dry weight as a function of RZT had changed such that the 42°C RZT was 43% and 47% less than 38° and 34°C RZT, respectively. Differences in root growth patterns between weeks eight and 16 suggest that trees were able to overcome the detrimental effects of the 38°C treatment whereas growth suppression by the 42°C treatment was still evident after 16 wk. Previous exposure of tree roots to supraoptimal RZT regimens may have long-term implications for suppressing growth and lengthening the establishment period of trees in the landscape,

scholarly journals Root Growth of Southern Magnolia Following Exposure to High Root-zone Temperatures

HortScience ◽  
1991 ◽  
Vol 26 (4) ◽  
pp. 370-371 ◽  
Author(s):  
Chris A. Martin ◽  
Dewayne L. Ingram
Keyword(s):  
Root Growth ◽  
Root Length ◽  
Root Zone ◽  
Dry Weight ◽  
Growth Patterns ◽  
Total Root Length ◽  
Root Zone Temperature ◽  
Magnolia Grandiflora ◽  
Root Dry Weight ◽  
Zone Temperature

Root growth of southern magnolia (Magnolia grandiflora Hort. `St. Mary') was studied for 16 weeks after an 8-week exposure to 30, 34, 38, or 42 ± 0.8C root-zone temperature (RZT) treatments applied for 6 hours daily. Immediately after RZT treatments, total root length of trees responded negatively to increased RZT in a quadratic pattern and the shoot and root dry weight of trees was similar. However, 8 and 16 weeks after RZT treatments, total root length responded linearly in a negative pattern to increased RZT, and shoot and root dry weight responded negatively to increased RZT in a linear and quadratic pattern, respectively. Root dry weight of trees exposed to 42C RZT treatment was 29% and 48% less than 38 and 34C RZT treatments, respectively, at week 8. By week 16, root dry weight as a function of RZT had changed such that the 42C RZT was 43% and 47% less than 38 and 34C RZT, respectively. Differences in root growth patterns between weeks 8 and 16 suggest that trees were able to overcome the detrimental effects of the 38C treatment, whereas growth suppression by the 42C treatment was still evident after 16 weeks.

scholarly journals Heterosis analysis in relation to drought tolerance in rice land races and their genotypes

2014 ◽  
Vol 6 (2) ◽  
pp. 804-811
Author(s):  
R. Ushakumari ◽  
R. Muthukamatchi ◽  
G. Thamodharan
Keyword(s):  
Drought Tolerance ◽  
Grain Yield ◽  
Plant Height ◽  
Root Length ◽  
Harvest Index ◽  
Dry Weight ◽  
Root Dry Weight ◽  
Shoot Ratio ◽  
Root Shoot Ratio ◽  
Standard Heterosis

An experiment was conducted in rice to study the heterosis for drought tolerance and grain yield in 24 hybrids developed from six landraces viz., Kallurundaikar, Kuliadichan, Kuruvaikalangiam, Mattaikar, Nootripathu and Vellaichithiraikar used as lines and four high yielding varieties viz., PMK 3, MDU 5, ASD 16 and ADT 36 used as testers for physio-morphological traits by Line x tester analysis. The experimental results revealed that the hybrids viz., Nootripathu / MDU 5, which had significant standard heterosis for eight characters namely days to 50% flowering, plant height, productive tillers, root length, root dry weight, root : shoot ratio, harvest index and grain yield per plant, Nootripathu / PMK 3 exhibited significant standard heterosis for seven characters namely plant height, root length, root dry weight, root : shoot ratio, 100 grain weight, harvest index, and grain yield per plant were found to be superior hybrids over the standard check variety PMK 3. High proline content which is an index for drought tolerance was recorded in hybrid Kuruvaikalangiam / ADT 36 (11.94%) exhibited significant standard heterosis which is found to be drought tolerant among the hybrids.

Sign in / Sign up

Export Citation Format

Share Document