scholarly journals Genotypic variation in rice yield enhancement by elevated CO2 relates to growth before heading, and not to maturity group

2009 ◽  
Vol 60 (2) ◽  
pp. 523-532 ◽  
Author(s):  
H. Shimono ◽  
M. Okada ◽  
Y. Yamakawa ◽  
H. Nakamura ◽  
K. Kobayashi ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Rice Yield ◽  
Genotypic Variation ◽  
Yield Enhancement ◽  
Maturity Group

Rice yield enhancement by elevated CO2 is reduced in cool weather

2007 ◽  
Vol 14 (2) ◽  
pp. 276-284 ◽  
Author(s):  
HIROYUKI SHIMONO ◽  
MASUMI OKADA ◽  
YASUHIRO YAMAKAWA ◽  
HIROFUMI NAKAMURA ◽  
KAZUHIKO KOBAYASHI ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Rice Yield ◽  
Yield Enhancement

Effects of Elevated CO2 and Global Climate Change on Rice Yield in Japan

1996 ◽  
pp. 39-56 ◽  
Author(s):  
Takeshi Horie ◽  
Tsutomu Matsui ◽  
Hiroshi Nakagawa ◽  
Kenji Omasa
Keyword(s):  
Climate Change ◽  
Elevated Co2 ◽  
Global Climate Change ◽  
Rice Yield ◽  
Global Climate

scholarly journals Estimate of Rice Yield of Japan under the Conditions with Elevated CO2 and Increased Temperature by using Third Mesh Climate Data.

1998 ◽  
Vol 54 (3) ◽  
pp. 235-245 ◽  
Author(s):  
Sei-ichiro YONEMURA ◽  
Masaharu YAJIMA ◽  
Hidemitsu SAKAI ◽  
Masahiro MOROKUMA
Keyword(s):  
Elevated Co2 ◽  
Rice Yield ◽  
Climate Data ◽  
Increased Temperature

scholarly journals Response of rice yield and yield components to elevated [CO2]: A synthesis of updated data from FACE experiments

2020 ◽  
Vol 112 ◽  
pp. 125961 ◽  
Author(s):  
Chunhua Lv ◽  
Yao Huang ◽  
Wenjuan Sun ◽  
Lingfei Yu ◽  
Jianguo Zhu
Keyword(s):  
Elevated Co2 ◽  
Yield Components ◽  
Rice Yield ◽  
Yield And Yield Components

scholarly journals Climate Change Impacts on Cacao: Genotypic Variation in Responses of Mature Cacao to Elevated CO2 and Water Deficit

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 818
Author(s):  
Fiona Lahive ◽  
Liam R. Handley ◽  
Paul Hadley ◽  
Andrew J. Daymond
Keyword(s):  
Climate Change ◽  
Water Use Efficiency ◽  
Water Deficit ◽  
Quantum Efficiency ◽  
Elevated Co2 ◽  
Water Use ◽  
Biomass Production ◽  
Genotypic Variation ◽  
Negative Effect ◽  
Use Efficiency

Climate change poses a significant threat to agricultural production in the tropics, yet relatively little research has been carried out to understand its impact on mature tropical tree crops. This research aims to understand the genotypic variation in growth and photosynthesis in mature cacao trees in response to elevated CO2 and water deficit. Six genotypes were grown under greenhouse conditions at ambient (ca. 437 ppm) and elevated CO2 (ca. 724 ppm) and under well-watered and water deficit conditions for 23 months. Leaf- and canopy-level photosynthesis, water-use efficiency, and vegetative growth increased significantly in response to elevated CO2. Water deficit had a significant negative effect on many photosynthetic parameters and significantly reduced biomass production. The negative effect of water deficit on quantum efficiency was alleviated by elevated CO2. Genotypic variation was observed in several parameters including stomatal conductance, stomatal density and index, quantum efficiency, and biomass production, indicating the potential to develop more climate-change-resilient genotypes that can cope with predicted future climate change conditions. Elevated CO2 reduced some of the negative effects of water deficit through changes in water-use efficiency and light utilisation and reduced the negative impact of water deficit on biomass accumulation, but this was genotype-specific.

scholarly journals Growth Efficiency of Greengram (Vigna radiata L. Wilczek) Under Elevated Carbondioxide Condition

2020 ◽  
pp. 58-73
Author(s):  
Tarique Aziz ◽  
Ranjan Das ◽  
Sangita Das
Keyword(s):  
Elevated Co2 ◽  
Growth Parameters ◽  
Genotypic Variation ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Green Gram ◽  
C3 Plants ◽  
Nodule Formation ◽  
Total Biomass ◽  
Agricultural Crop

The CO2 concentration in the atmosphere is rising and anticipated to be doubled by the end of the current century. Agricultural crop production is one of the key sectors that might be affected by rising atmospheric CO2 through its effect on photosynthetic rates and thus productivity. It was reported that C3 plants respond to elevated CO2 by modification of morpho-physiological traits. The crop selected for the present study was Green gram (Vigna radiate L. Wilczek). Though it is an important crop, the availability of pulses has declined. So, a study of the plant responses to high atmospheric CO2 is important since it regulates productivity and quality. Moreover information about genotypic variation of crops under elevated CO2 is lacking in legumes. The general aim of the study is test whether Green gram can adapt to such a change and to explore mechanisms underlining the adaptive response. Six genotypes of green gram used in the study were SML1827, SML832, SML1831, PM1533, Pusa M-19-31, and Pant M-5. Three different levels of CO2 concentration namely 390ppm, 600 ppm and 750ppm under open top chambers along with an ambient concentration were maintained to assess the response of growth, physiological and yield parameters. The purpose of Open Top Chamber was to study the response of plants in high CO2 environment with precise control and regulation of desired CO2, temperature and humidity. The results obtained for this experiment showed that elevated CO2 has a positive effect on crop growth and development. Results indicated that 600ppm CO2 enhanced some growth parameters viz. leaf area, number of branches per plant, number of effective root nodules and total biomass of plant which ultimately influenced the yield. Under 750 ppm CO2, An opposite trend was recorded where yield was significantly reduced. Genotypes like Pant M-5, Pusa M-19-31 could be considered as better genotypes when grown under elevated levels of CO2 as they have better N acquisition capability because of greater nodule formation in addition to biomass accumulation. Therefore, such genotypes may be utilized as future breeding materials for adaptation to the changed climatic condition.

scholarly journals Genotypic Variation of Different Maturity Groups of Maize (Zea mays L.) for Seed Physiological Quality

2020 ◽  
pp. 139-149
Author(s):  
O. Bankole ◽  
A. Oluwaranti ◽  
S. A. Ajayi ◽  
F. E. Awosanmi
Keyword(s):  
Crop Production ◽  
Seed Quality ◽  
Genotypic Variation ◽  
Accelerated Ageing ◽  
Maturity Group ◽  
Early Maturity ◽  
Maize Genotypes ◽  
Maize Varieties ◽  
Late Maturity ◽  
Maturity Groups

Maize genotypes of different maturity groups with good seed quality had been developed, but there is little or no information on how the seed quality of the maize genotypes are affected by their maturity groups. Therefore, the objectives of this study were to evaluate maize varieties of different maturity groups for seed quality and determine genotypic variations that exist within the different maturity groups of maize for seed quality. Laboratory experiments were conducted in the Seed Science Laboratory of the Department of Crop Production and Protection, Obafemi Awolowo University, Ile-Ife, Nigeria. Seeds of sixteen maize genotypes of different maturity groups were subjected to imbibition, germination, accelerated ageing, conductivity and seedling vigor tests. The late maturity group (TZLCOMP.4DTF2,TZLCOMP. 1C6/DT.SYN-1-W, WHITEDTSTR/TZLCOMP.1-W, OBASUPER1) gave the best viability, speed of germination and days to complete germination while the extra early maturity group (2009TZEE-ORISTRQPM, 2000SYNEE-WSTR,2013TZEE-WDTSTR, TZEE-WPOPDTC2STRC5F2) had the least performance. The early (2014TZE –YDTSTR, 2013DTESTR–WSYN, EVDT-2000STRC0, 2009DTEWSTRSYN) and extra-early maturity groups had the longest root length and highest root number respectively. However, the different maturity groups of maize evaluated imbibed water at the same rate. TZEE-WPOP DT STR C5 F2, 2013 DTE STR – W SYN, AFLATOXIN R-SYN2, TZL COMP.1 C6/DT. SYN-1-W among extra early, early, intermediate and late maturity groups respectively performed best for viability and vigor tests.

scholarly journals Rice cultivar responses to elevated CO2 at two free-air CO2 enrichment (FACE) sites in Japan

2013 ◽  
Vol 40 (2) ◽  
pp. 148 ◽  
Author(s):  
Toshihiro Hasegawa ◽  
Hidemitsu Sakai ◽  
Takeshi Tokida ◽  
Hirofumi Nakamura ◽  
Chunwu Zhu ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Carbon Allocation ◽  
Brown Rice ◽  
Co2 Enrichment ◽  
Rice Cultivar ◽  
Yield Enhancement ◽  
Yield Response ◽  
Co2 Response ◽  
Free Air Co2 Enrichment ◽  
Free Air

There is some evidence that rice cultivars respond differently to elevated CO2 concentrations ([CO2]), but [CO2] × cultivar interaction has never been tested under open-field conditions across different sites. Here, we report on trials conducted at free-air CO2 enrichment (FACE) facilities at two sites in Japan, Shizukuishi (2007 and 2008) and Tsukuba (2010). The average growing-season air temperature was more than 5°C warmer at Tsukuba than at Shizukuishi. For four cultivars tested at both sites, the [CO2] × cultivar interaction was significant for brown rice yield, but there was no significant interaction with site-year. Higher-yielding cultivars with a large sink size showed a greater [CO2] response. The Tsukuba FACE experiment, which included eight cultivars, revealed a wider range of yield enhancement (3–36%) than the multi-site experiment. All of the tested yield components contributed to this enhancement, but there was a highly significant [CO2] × cultivar interaction for percentage of ripened spikelets. These results suggest that a large sink is a prerequisite for higher productivity under elevated [CO2], but that improving carbon allocation by increasing grain setting may also be a practical way of increasing the yield response to elevated [CO2].

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