Root growth and carbohydrate partitioning in cotton subjected to shading in the initial phase

Echer, Fábio Rafael; Zanfolin, Priscila Roberta Leme; Moreira, Ana Carolina Mônico; Pacheco, Ana Cláudia; Gorni, Pedro Henrique

doi:10.1590/0103-8478cr20180749

Cited by 8 publications

(10 citation statements)

References 16 publications

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“…Potassium management did not affect LAI early in the growing cycle in both seasons (Fig 2 ), probably because cotton canopy growth is slow at this stage, as the plant invests most of the carbohydrates to develop its root system (Echer et al 2019). However, at 60 and 90 DAE in the rst season and 60, 90 and 120 DAE in the second season, LAI was higher when the plant was fertilized with K, as a result of the increased leaf area and life span, as the leaf's life is reduced by K de ciency (Wright 1999).…”

Section: Discussionmentioning

confidence: 98%

Effects of Potassium Management on Physiological Traiats, Enzyme Activity and Cotton Fiber Cellulose Content

Echer

Perez

Baltazar

et al. 2021

Preprint

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AimsPotassium (K) is prone to be washed out of plant tissues independent of mineralization since it is not strongly bound to organic structures in the plant. Therefore, cover crops can enhance K cycling in cropping systems increasing the nutrient use efficiency by taking it up deep in the soil profile and releasing it on the soil surface. However, it is not clear if this cycling would have an effect on cotton morphophysiology, enzyme activity, and eventually on fiber quality. MethodsPotassium was applied to two cotton cultivars, either to the cover crop ruzigrass (Urochloa ruzisiensis), or to cotton grown after the grass or not, and split between the cover crop and cotton. ResultsCotton leaf area index was increased late in the season by K, with small differences between fertilized treatments, but was highest at full bloom when at least part of the K was applied to cotton. Stomatal conductance was improved, mainly late in the season and when cotton was grown after ruzigrass. Consequently, the enzymatic activity and accumulation of cellulose in the cotton fiber were also increased. ConclusionPotassium fertilization improves cotton physiological parameters such as leaf area index and stomatal conductance, but the effect on enzyme activity depends on the enzyme and on the cotton cultivar. Early cellulose accumulation in the fiber is favored by potassium fertilization and cotton rotation with ruzigrass.

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Section: Discussionmentioning

confidence: 98%

Effects of Potassium Management on Physiological Traiats, Enzyme Activity and Cotton Fiber Cellulose Content

Echer

Perez

Baltazar

et al. 2021

Preprint

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“…Artifi cial shading can be an alternative to mitigate the eff ects of some abiotic factors, including salt stress, since it limits the solar radiation incident on the leaf surface and modifi es the environmental conditions in order to improve plant development (César et al, 2014;Ahemd et al, 2016;Echer et al, 2019;Asghar et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF ARTIFICIAL SHADING AND IRRIGATION WITH BRACKISH WATER ON THE INITIAL DEVELOPMENT OF Anadenanthera colubrina (Vell.) Brenan PLANTS

et al. 2022

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The use of management strategies or changes in the cultivation environment can reduce the impacts of irrigation water salinity on plant development. Therefore, in this research, physiological responses, initial growth, and plant quality of Anadenanthera colubrina (Vell.) Brenan (Angico Branco) were evaluated under different levels of shading and electrical conductivity of the irrigation water, seeking to identify the most favorable conditions for the development of this species using brackish water. The experiment was carried out in randomized blocks with split plots and four replications. The plots were formed by four environments with different shading levels: 0 (full sun), 30, 50, and 70%, and the subplots, formed by five increasing levels of electrical conductivity of the irrigation water: 0.4, 1.6, 2.8, 4.0, and 5.2 dS.m−1. The following variables were evaluated: substrate electrical conductivity, leaf gas exchange, plant height, biomass production, and Dickson quality index at 40 days in a nursery. The use of artificial shading favored plant development and photosynthesis rate, even when irrigated with moderate and high salinity water. The DQI showed that A. colubrina plants presented higher quality index when produced under intermediate shading (30% and 50%), with yield losses below 20% when irrigated with water with electrical conductivity up to 2.8 dS.m−1.

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“…Despite being a hardy plant, high cotton yields depend on the appropriate combination of abiotic factors such as temperature, light, water and nutrients. Particularly in tropical regions and rainfed systems, rainy and cloudy days limit radiation availability, especially at the beginning of the plants development, which results in reduced yield (Echer & Rosolem, 2015) and root growth (Echer et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of continuous and intermittent shade on carbohydrate accumulation and root growth in cotton

Echer

Mignacca

Gorni³

et al. 2022

Agraria

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Light restriction is one of the environmental factors that most limits cotton (Gossypium hirsutum L.) growth and production in tropical regions, due to the plant exposure to cloudy days with low radiation availability. This study evaluated the initial development of cotton root growth under intermittent shade intervals of 2 (2-d), 4 (4-d), and 8 (8-d) days, continuous shade and no-shade (control) treatments, using a black screen to reduce light intensity by 50%. Continuous shade reduced the total root length by 30% compared to the control. Decreases in root length were verified on the thinnest roots (0-0.5 mm) and were approximately 47% in the shaded and 2-d shaded treatments, 33.8% with an 8-d shade interval, and 11% with a 4-d shade interval. Plants shaded continuously and under the 2-d-shade interval showed higher height, but fewer leaves. Continuous shading and 4-d shade interval decreased the plant biomass and the carbohydrate accumulation on leaves and squares. It was concluded that continuous or intermittent 4-d shade reduces carbohydrate content on leaves and stems, continuous shading reduces cotton root length, and the root length of thinner roots (0-0.5 mm) is affected by continuous or 2-d intermittent shade.

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Root growth and carbohydrate partitioning in cotton subjected to shading in the initial phase

Cited by 8 publications

References 16 publications

Effects of Potassium Management on Physiological Traiats, Enzyme Activity and Cotton Fiber Cellulose Content

Effects of Potassium Management on Physiological Traiats, Enzyme Activity and Cotton Fiber Cellulose Content

EFFECTS OF ARTIFICIAL SHADING AND IRRIGATION WITH BRACKISH WATER ON THE INITIAL DEVELOPMENT OF Anadenanthera colubrina (Vell.) Brenan PLANTS

Effect of continuous and intermittent shade on carbohydrate accumulation and root growth in cotton

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