Diurnal changes in gas exchange and chlorophyll fluorescence parameters of Fritillaria cirrhosa and F. delavayi under field conditions

2009 ◽  
Vol 47 (2) ◽  
pp. 191-198 ◽  
Author(s):  
Xi-Wen Li ◽  
Shi-Lin Chen
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Field Conditions ◽  
Diurnal Changes ◽  
Chlorophyll Fluorescence Parameters ◽  
Fluorescence Parameters ◽  
Fritillaria Cirrhosa

Diurnal changes in chlorophyll fluorescence parameters and their relationships with vegetation productivity in subtropical coniferous plantations

2019 ◽  
Vol 39 (15) ◽  
Author(s):  
陈敬华 CHEN Jinghua ◽  
王绍强 WANG Shaoqiang ◽  
李悦 LI Yue ◽  
王辉民 WANG Huimin ◽  
杨风亭 YANG Fengting ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Diurnal Changes ◽  
Vegetation Productivity ◽  
Chlorophyll Fluorescence Parameters ◽  
Fluorescence Parameters ◽  
Coniferous Plantations

scholarly journals Waterlogging tolerance evaluation of fifteen poplar clones cultivated in the Jianghan Plain of China

2021 ◽  
Vol 49 (3) ◽  
pp. 12421
Author(s):  
Ruonan GENG ◽  
Xinye ZHANG ◽  
Xiaoping FAN ◽  
Qian HU ◽  
Tianhong NI ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Leaf Gas Exchange ◽  
Survival Rates ◽  
Biomass Accumulation ◽  
Co2 Concentration ◽  
Jianghan Plain ◽  
Waterlogging Tolerance ◽  
Chlorophyll Fluorescence Parameters ◽  
Fluorescence Parameters

To provide references for poplar cultivation in waterlogged prone area of Jianghan Plain of China, the waterlogging tolerance of 15 poplar clones widely cultivated in these areas were evaluated based on their responses to 45-day waterlogging stress followed by 15-day drainage recovery in morphology, growth, biomass accumulation, leaf gas exchange and chlorophyll fluorescence parameters. The results showed that the normal watered seedlings (CK) of the 15 clones grew vigorously during the experiment, and no defoliation and death occurred. For the seedlings under waterlogging treatment (water 10 cm above the soil surface), its morphology changed markedly, including slowing growth, chlorosis and abscission of leaves, development of hypertrophied lenticels and adventitious roots etc. Waterlogging stress significantly inhibited the seedling growth of height and ground diameter, biomass accumulation, as well as leaf gas exchange and chlorophyll fluorescence parameters of the 15 clones with varying degrees. The net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO2 concentration/ environmental CO2 concentration (Ci/Ca), variable fluorescence (Fv), variable fluorescence/ initial fluorescence (Fv/Fo) and PS Ⅱ primary light energy conversion efficiency (Fv/Fm) decreased gradually with the prolonged waterlogging, and reached their bottom on day 45. During the terminal recovery stage, the leaf gas exchange and chlorophyll fluorescence parameters of the most clones increased, but their recovery abilities were significantly different. At the end of the experiment, the highest survival rates (100%) were observed in DHY, HS-1, HS-2, I-72, I-69, I-63 and NL-895, and the lowest (zero) occurred in XYY. Survival rates of the other clones ranged from 33.33% to 83.33%. Both results of cluster analysis and membership function analysis showed that HS-1, I-69, DHY, NL-895 and HS-2 had the strongest waterlogging tolerance, XYY and HBY were the worst, and the other clones were moderate. These results would provide guidance not only for the selection of cultivated varieties in Jianghan Plain, but also for the selection of hybrid parents for waterlogging resistance breeding.

scholarly journals Effects of Nitrogen Application on Chlorophyll Fluorescence Parameters and Leaf Gas Exchange in Naked Oat

2013 ◽  
Vol 12 (12) ◽  
pp. 2164-2171 ◽  
Author(s):  
Ye-chun LIN ◽  
Yue-gao HU ◽  
Chang-zhong REN ◽  
Lai-chun GUO ◽  
Chun-long WANG ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Leaf Gas Exchange ◽  
Nitrogen Application ◽  
Chlorophyll Fluorescence Parameters ◽  
Naked Oat ◽  
Fluorescence Parameters

scholarly journals Polyploidy effects on frost tolerance and winter survival of garden pansy genotypes

2011 ◽  
Vol 32 (No. 4) ◽  
pp. 138-146 ◽  
Author(s):  
A. D Lagibo ◽  
F. Kobza ◽  
P. Suchánková
Keyword(s):  
Chlorophyll Fluorescence ◽  
Frost Tolerance ◽  
Field Conditions ◽  
Winter Survival ◽  
Time Intervals ◽  
Total Carotenoids ◽  
Chlorophyll Fluorescence Parameters ◽  
Ploidy Levels ◽  
Fluorescence Parameters ◽  
Frost Stress

This study was conducted to interpret the differences in frost tolerance and winter survival between 8x, 10x, 12x, 14x, and 16x ploidy levels of garden pansy (Viola &times; wittrockiana Gams) genotypes grown in the field conditions. Plants of each genotype were analyzed for their ploidy levels using flow cytometry. The chlorophyll fluorescence parameters were measured with portable chlorophyll fluorometer in the greenhouse and in the field at different time intervals. Increased frost stress generally reduced the fluorescence values in all genotypes. However, the genotypes differed significantly in their responses to frost as they were exposed to minimum temperatures of 1&deg;C to &ndash;7.7&deg;C in the field. Based on the percentage reduction in F<sub>V</sub>/F<sub>M</sub> values against &ndash;7.7&deg;C temperature the hexadecaploids were ranked as sensitive to intermediate followed by 12x (sensitive), and genotypes with 10x and 14x ploidy levels were tolerant as the controls. The winter survival rate of hexadecaploids was by 7 to 9% lower than in the controls followed by the genotype with 12x and both genotypes with 10x and 14x ploidy levels were about equal to the controls. On the other hand, the content of photosynthetic pigments (chlorophyll a, b and total carotenoids) was the highest in hexadecaploids and tended to increase with increasing ploidy level. Further, the results gave insight that chlorophyll fluorescence could be applied directly in the field conditions to screen genotypes and select plants having higher frost tolerance in combination with improved aesthetic qualities. &nbsp;

The effect of nitrogen deficiency on leaf gas exchange and chlorophyll fluorescence parameters in sunflower

Plant Science ◽  
1996 ◽  
Vol 118 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Stefania Ciompi ◽  
Elisa Gentili ◽  
Lucia Guidi ◽  
Gian Franco Soldatini
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Leaf Gas Exchange ◽  
Nitrogen Deficiency ◽  
Chlorophyll Fluorescence Parameters ◽  
Fluorescence Parameters
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