scholarly journals Study on Growth Characteristics of Some Brassica Species under Moisture Stress and Elevated Carbondioxide

2020 ◽  
pp. 373-389
Author(s):  
Ranjan Das
Keyword(s):  
Elevated Co2 ◽  
Growth Parameters ◽  
Co2 Enrichment ◽  
Brassica Species ◽  
Moisture Stress ◽  
Carbon Dioxide Enrichment ◽  
Yield Attributes ◽  
North West ◽  
Growing Period ◽  
Free Air

Brassica juncea and Brassica campestries is two important oil seed crop of North-West India experiences intermittent moisture stress during its growing period. Thus a study was carried out to ameliorate the moisture stress through elevated CO2 applying Free Air CO2 Enrichment (FACE) technology. The consequences of CO2 enrichment were related to the rate of accelerated photosynthesis under both irrigated and moisture stress situation with significant decreases in stomatal conductance. The elevated CO2 brought about a significant enhancement in all the plant growth parameters studied, and also ameliorates the of moisture stress. The carbon dioxide enrichment improves the productivity of Brassica cultivars viz. ‘Pusa Gold’ and ‘RH-30’ through changes in various yield attributes and also nullifying the adverse effect of moisture stress.

scholarly journals Interactive Effect of Elevated CO2 and Moisture Stress on Anatomical Configuration in Brassica Species

2021 ◽  
pp. 142-156
Author(s):  
Ranjan Das
Keyword(s):  
Elevated Co2 ◽  
Interactive Effect ◽  
Co2 Enrichment ◽  
Leaf Size ◽  
Brassica Species ◽  
Moisture Stress ◽  
Structural Development ◽  
Free Air ◽  
Brassica Plant ◽  
Study Results

Free-Air CO2 Enrichment (FACE) was developed as a means to study the crops response to elevated level of CO2 under the fully open-air field conditions. In this study, results of FACE experiments are summarized by disusing the root and shoot anatomy. Result indicated that elevated Co2 significantly altered the root and shoot xylem and phloem characters such as both proto and meta xylem and phloem; vessels, character of root and shoots which are vital for the transpiration regulation, along with leaves photosynthesis as a whole. The coexistence of two ontogenetically different phloem sieve element in Brassica plant under elevated CO2 might have possibility of two different transport functions at the same time. One may be involved in supplying for the structural development (leaf size, stem girth and root volume) and other may cater the need of increased new sinks. Though these parameters were found to decrease under moisture stress condition but these impacts of stress were reduced at higher level of atmospheric CO2.

scholarly journals Effect of elevated CO2 and elevated temperature on growth and biomass accumulation in Valeriana jatamansi Jones. under different nutrient status in the western Himalaya

2021 ◽  
Vol 22 (4) ◽  
pp. 419-428
Author(s):  
MUNISH KAUNDAL ◽  
RAKESH KUMAR
Keyword(s):  
Elevated Temperature ◽  
Leaf Area ◽  
Elevated Co2 ◽  
Growth Parameters ◽  
Co2 Enrichment ◽  
Biomass Accumulation ◽  
Leaf Biomass ◽  
Total Biomass ◽  
Free Air ◽  
Valeriana Jatamansi

Valeriana jatamansi is an important medicinal and aromatic plant used as sedative in modern  and traditional medicines butthere is dearth of literature regarding how elevated CO2 and temperature affect on this plant. Therefore,an experiment was conducted to study the effect of elevated CO2 (550±50 µmol mol-1) and elevated temperature (2.5±0.5°C above ambient) and vermicompost on growth, phenology and biomass accumulation in V. jatamansi under Free Air CO2 Enrichment (FACE) and Free Air TemperatureIncrement (FATI) facilities at Palampur, India, during 2013-2015. Growth parameters and biomass accumulation into different parts were observed at 4, 12 and 16 months after exposure (MAE). Plant height, total dry biomass and leaf area plant -1 increased in elevated CO2 treatment applied with vermicompost as compared to the other treatments. Elevated CO2 significantly enhanced leaf area (3.5-23.5%), leaf biomass (12.7-33.2%), stem (15.3-15.6%), root (3.2-72.5%), rhizome (2.1-42.2%) and total biomass (7.7-52.7%), whereas elevated temperature increased aboveground biomass (15.0-45.3%), belowground biomass (11.6-55.5%) and total biomass (12.4-7.9%), respectively, as compared to ambient. Phenological stages were advanced by 1.2-3.9 days under FACE and FATI as compared to ambient. The results indicate that aboveground, belowground and total biomass increased under elevated CO2 and elevated temperature as compared to ambient. 

Elevated CO2 in semi-arid cropping systems: A synthesis of research from the Australian Grains Free Air CO2 Enrichment (AGFACE) research program

2022 ◽  
pp. 1-73
Author(s):  
Glenn J. Fitzgerald ◽  
Michael Tausz ◽  
Roger Armstrong ◽  
Joe Panozzo ◽  
Piotr Trębicki ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Research Program ◽  
Cropping Systems ◽  
Co2 Enrichment ◽  
Free Air Co2 Enrichment ◽  
Free Air ◽  
Semi Arid

scholarly journals Elevated CO2 (free-air CO2 enrichment) increases grain yield of aluminium-resistant but not aluminium-sensitive wheat (Triticum aestivum) grown in an acid soil

2018 ◽  
Vol 123 (3) ◽  
pp. 461-468 ◽  
Author(s):  
Jinlong Dong ◽  
Stephen Grylls ◽  
James Hunt ◽  
Roger Armstrong ◽  
Emmanuel Delhaize ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Elevated Co2 ◽  
Acid Soil ◽  
Co2 Enrichment ◽  
Free Air Co2 Enrichment ◽  
Free Air

scholarly journals High sink strength prevents photosynthetic down-regulation in cassava grown at elevated CO2 concentration

2020 ◽  
Author(s):  
Ursula M Ruiz-Vera ◽  
Amanda P De Souza ◽  
Michael R Ament ◽  
Roslyn M Gleadow ◽  
Donald R Ort
Keyword(s):  
Elevated Co2 ◽  
Leaf Tissue ◽  
Co2 Enrichment ◽  
Co2 Concentration ◽  
Cultivar Differences ◽  
Sink Strength ◽  
Down Regulation ◽  
Tropical Regions ◽  
Free Air ◽  
Intrinsic Water Use Efficiency

Abstract Cassava has the potential to alleviate food insecurity in many tropical regions, yet few breeding efforts to increase yield have been made. Improved photosynthetic efficiency in cassava has the potential to increase yields, but cassava roots must have sufficient sink strength to prevent carbohydrates from accumulating in leaf tissue and suppressing photosynthesis. Here, we grew eight farmer-preferred African cassava cultivars under free-air CO2 enrichment (FACE) to evaluate the sink strength of cassava roots when photosynthesis increases due to elevated CO2 concentrations ([CO2]). Relative to the ambient treatments, elevated [CO2] treatments increased fresh (+27%) and dry (+37%) root biomass, which was driven by an increase in photosynthesis (+31%) and the absence of photosynthetic down-regulation over the growing season. Moreover, intrinsic water use efficiency improved under elevated [CO2] conditions, while leaf protein content and leaf and root cyanide concentrations were not affected. Overall, these results suggest that higher cassava yields can be expected as atmospheric [CO2] increases over the coming decades. However, there were cultivar differences in the partitioning of resources to roots versus above-grown biomass; thus, the particular responses of each cultivar must be considered when selecting candidates for improvement.

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