The response of lupins to waterlogging

1976 ◽  
Vol 16 (81) ◽  
pp. 549 ◽  
Author(s):  
P Broue ◽  
DR Marshall ◽  
J Munday
Keyword(s):  
Root System ◽  
Vegetative Growth ◽  
Growth Response ◽  
Short Term ◽  
Controlled Environments

The growth response of species and lines of lupin (Lupinus spp.) to short-term flooding of the root system during vegetative growth was measured in glasshouse and controlled environments. L. luteus was consistently more flood tolerant than L. albus, L. angustifolius and L. mutabilis. Some data showed also that lines within species may vary in their response to flooding but the differences among lines were less marked than those among species.

scholarly journals Differences in Vegetative Growth Response to Soil Flooding between Common and Tartary Buckwheat

2005 ◽  
Vol 8 (5) ◽  
pp. 525-532 ◽  
Author(s):  
Hiroyuki Matsuura ◽  
Shinobu Inanaga ◽  
Takahisa Tetsuka ◽  
Kouhei Murata
Keyword(s):  
Vegetative Growth ◽  
Growth Response ◽  
Tartary Buckwheat ◽  
Soil Flooding

scholarly journals Growth Response of Crapemyrtle to Geographical Area and Production Light Level

2007 ◽  
Vol 25 (1) ◽  
pp. 26-32
Author(s):  
K.M. Brooks ◽  
G.J. Keever ◽  
J.E. Altland ◽  
J.L. Sibley
Keyword(s):  
Vegetative Growth ◽  
Growth Response ◽  
Geographical Area ◽  
Geographic Location ◽  
Light Level ◽  
First Year ◽  
Tree Form ◽  
Trunk Diameter ◽  
Second Year

Abstract The effects of geographic location and production light level on vegetative growth and flowering were evaluated as a means of accelerating the development of tree-form crapemyrtles. By the end of the first year of the experiment, Dynamite™, ‘Muskogee’, ‘Natchez’, and ‘Tuscarora’ grown in Oregon were as much as 42, 51, 43, and 92% taller, respectively, than plants in Alabama, while plants generally had less trunk diameter in Oregon. ‘Muskogee’ and ‘Natchez’ in both locations and ‘Tuscarora’ in Alabama were generally taller when grown under 50% shade than plants in full sun, while height of Dynamite™ was not affected by production light level. Trunk diameter of ‘Natchez’ in both locations and of Dynamite™ in Alabama was less when plants were grown under shade, while trunk diameter of ‘Muskogee’ and ‘Tuscarora’ was not affected by production light level. Flowering of plants grown under shade in Alabama was delayed, while no plants in Oregon flowered the first year. In the second year of the experiment when all plants were grown in full sun, all cultivars continued to be taller in Oregon, while trunk diameter remained greater in Alabama. The height advantage gained from growing plants under shade the previous year was not evident in any cultivar by the end of the second year, while trunk diameter was similar for all cultivars previously grown in full sun and under 50% shade. There was no difference in flowering of plants in Alabama previously grown under 50% shade and in full sun, while 50 to 100% of the four cultivars in Oregon flowered with no obvious difference due to prior production light level.

scholarly journals 14Carbon-labeled Photosynthate Partitioning in Ilex crenata `Rotundifolia' at Supraoptimal Root-zone Temperatures

1990 ◽  
Vol 115 (6) ◽  
pp. 1008-1013 ◽  
Author(s):  
John M. Ruter ◽  
Dewayne L. Ingram
Keyword(s):  
Root System ◽  
Root Respiration ◽  
Shoot Growth ◽  
Root Zone ◽  
Membrane Damage ◽  
Optimum Temperature ◽  
Short Term ◽  
Photosynthate Partitioning ◽  
Root Zones ◽  
Split Root

Ilex crenata Thunb. `Rotundifolia' split-root plants were grown for 3 weeks with root zones at 30/30, 30/34, 30/38, 30/42, 34/34, 38/38, and 42/42C. The 38C root-zone treatment was the upper threshold for several growth and physiological characteristics. A portion of the root system grown at or near the optimum temperature could compensate, in terms of shoot growth, for part of the root system exposed to supraoptimal root-zone temperatures up to 38C. Higher root-zone temperatures did not affect short-term photosynthetic rates or root : shoot ratios, but altered photosynthate partitioning to various stem and root sinks. Although no differences were found for total 14C partitioned to the roots, partitioning of 14C into soluble and insoluble fractions and the magnitude of root respiration and exudation were influenced by treatment. Heating half of a root system at 38C increased the amount of 14C respired from the heated side and increased the total CO2respired from the nonheated (30C) half. Exposure of both root halves to 42C resulted in membrane damage that increased the loss of 14C-labeled photosynthates through leakage into the medium.

scholarly journals Vegetative growth response of cotton plants due to growth regulator supply via seeds

2015 ◽  
Vol 37 (3) ◽  
pp. 361
Author(s):  
João Vitor Ferrari ◽  
Enes Furlani Júnior ◽  
Samuel Ferrari ◽  
Ana Paula Portugal Gouvea Luques
Keyword(s):  
Growth Regulator ◽  
Vegetative Growth ◽  
Growth Response ◽  
Cotton Plants

Correction - The effects of temperature on the vegetative growth of six tropical legume species

1968 ◽  
Vol 8 (34) ◽  
pp. 528
Author(s):  
PC Whiteman
Keyword(s):  
Vegetative Growth ◽  
Dry Weight ◽  
Legume Species ◽  
Optimum Temperature ◽  
Subsequent Growth ◽  
Tropical Legume ◽  
Controlled Environments ◽  
Effects Of Temperature ◽  
Initial Seed ◽  
Temperate Legumes

Six tropical legume species, viz. Phaseolus lathyroides, P. atropurpureus, Desmodium uncinatum, D. intortum, D. sandwicense, and Glycine javanica, were grown in controlled environments. At the first harvest (14 days) dry weight of seedling tops was linearly related to initial seed dry weight. Subsequent growth at the lowest temperatures, 15/10�C and 18/13�C (day/night) was severely curtailed, and plants developed abnormally. The optimum temperature for growth of all the species was in the range of 30/25 � 3�C, which is generally lower than values reported for the tropical grasses, and higher than those for the temperate legumes and grasses.

Modeling water and nutrient uptake by crops: simulate uptake to predict growth or simulate growth to predict uptake?

2021 ◽  
Author(s):  
Jan Vanderborght ◽  
Andrea Schnepf ◽  
Mathieu Javaux ◽  
Guillaume Lobet
Keyword(s):  
Water Stress ◽  
Nutrient Uptake ◽  
Root System ◽  
Water Flow ◽  
Water Uptake ◽  
Growth Response ◽  
Upland Rice ◽  
Small Scale ◽  
Crop Water ◽  
The Impact

<p>We developed root scale models that simulate water and nutrient uptake by crops. Water flow in the soil and root systems was linked in order to describe root water uptake as a function of root properties and distributions, soil and leaf water potentials. One of the underlying motivations is to predict the crop water stress level and its impact on transpiration and growth. The mechanistic description of water fluxes resulted in models that were sensitive to hydraulic properties of the root system, including root density, and root distribution with depth. These sensitivities improved predictions of crop water uptake and water stress in different soils and for different water treatments. Crucial was the correct representation of the root system and its response to different ‘treatments’. Thus, in order to predict the impact of water stress on growth, the growth response to the water stress must be predicted. So far, these response functions and especially the distribution of carbon within the plant to the different plant organs are empirical functions. A coupled carbon and water flow model within the plant is a way forward to more mechanistic descriptions of these responses. A similar storyline can be developed for nutrient uptake. Mechanistic nutrient uptake models do not consider nutrient transport within the root system but focus on transport towards the root surface. Multi-scale flow and transport simulations demonstrated that small scale transport towards growing root tips and root system scale water and nutrient distributions controlled nutrient uptake. These simulations predicted the observed interaction between water and phosphate uptake of an upland rice crop. However, here again, simulated uptake depended on the root development in response to nutrient and water stress. Mechanistic descriptions of root growth response to nutrients require a further understanding of plant physiological processes that cause these responses. </p>

The effects of temperature on the vegetative growth of six tropical legume species

1968 ◽  
Vol 8 (34) ◽  
pp. 528
Author(s):  
PC Whiteman
Keyword(s):  
Vegetative Growth ◽  
Dry Weight ◽  
Legume Species ◽  
Optimum Temperature ◽  
Subsequent Growth ◽  
Tropical Legume ◽  
Controlled Environments ◽  
Effects Of Temperature ◽  
Initial Seed ◽  
Temperate Legumes

Six tropical legume species, viz. Phaseolus lathyroides, P. atropurpureus, Desmodium uncinatum, D. intortum, D. sandwicense, and Glycine javanica, were grown in controlled environments. At the first harvest (14 days) dry weight of seedling tops was linearly related to initial seed dry weight. Subsequent growth at the lowest temperatures, 15/10�C and 18/13�C (day/night) was severely curtailed, and plants developed abnormally. The optimum temperature for growth of all the species was in the range of 30/25 � 3�C, which is generally lower than values reported for the tropical grasses, and higher than those for the temperate legumes and grasses.

scholarly journals Short-Term Recovery of Residual Tree Damage during Successive Thinning Operations

Forests ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 731
Author(s):  
Farzam Tavankar ◽  
Mehrdad Nikooy ◽  
Angela Lo Monaco ◽  
Francesco Latterini ◽  
Rachele Venanzi ◽  
...  
Keyword(s):  
Root System ◽  
Loblolly Pine ◽  
Diameter Growth ◽  
Plantation Forest ◽  
Short Term ◽  
Thinning Operations ◽  
Timber Plantations ◽  
Residual Tree ◽  
Pinus Taeda L ◽  
Manual Felling

In this study, damage to residual trees during thinning performed by motor-manual felling and whole tree skidding was studied in a loblolly pine (Pinus taeda L.) plantation. Forest intervention was carried out in 2016 and tree wounds were studied and examined over a period of three years. The results indicated that 8% of the residual trees suffered damage, of which 52% was caused by felling operations and 48% by extraction operations. Among the damaged trees, 13% had damage to the root system, 53% to the bole, and 34% to the crown area. The average wound size at the time of occurrence was 71.3 cm2. This was found to be reduced to 54.4 cm2 after a three year period. Wound intensity decreased with higher wound height and increased size. Three years after wound occurrence, only 6.6% were closed, 90.6% were still open, and 2.8% were decayed. The diameter growth in damaged trees was 1.7% lower than in undamaged trees (p > 0.05). Damage to the root system of residual trees reduced diameter growth by 3% (p < 0.05). Intensive wounds (damaged wood) caused a reduction of 22.7% in diameter growth (p < 0.01). In addition, the diameter growth in trees with decayed wounds was 27.4% lower than unwounded trees (p < 0.01). Pre-harvest planning, directional tree felling, marking of the extraction path before logging operations, employment of skilled logging workers, and post-harvest assessment of damaged residual trees are essential implementations in timber plantations.

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