scholarly journals Why Is the Invasive Plant Sphagneticola trilobata More Resistant to High Temperature Than Its Native Congener?

2021 ◽  
Vol 22 (2) ◽  
pp. 748
Author(s):  
Minling Cai ◽  
Xiaohua Lin ◽  
Jindi Peng ◽  
Junjie Zhang ◽  
Minghao Chen ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
High Temperature ◽  
Gas Exchange ◽  
Native Species ◽  
Molecular Mechanisms ◽  
Invasive Plant ◽  
Photosynthetic Pigment ◽  
Physiological Data ◽  
Physiological Level ◽  
Chlorophyll Fluorescence Parameters

Climate change and invasive alien species threaten biodiversity. High temperature is a worrying ecological factor. Most responses of invasive plants aimed at coping with adversity are focused on the physiological level. To explore the molecular mechanisms underlying the response of an invasive plant (Sphagneticola trilobata L.) to high temperature, using a native species (Sphagneticola calendulacea L.) as the control, relevant indicators, including photosynthetic pigments, gas exchange, chlorophyll fluorescence, the antioxidant system, and related enzyme-coding genes were measured. The results showed that the leaves of S. calendulacea turned yellow, photosynthetic pigment content (Chl a, Chl b, Car, Chl) decreased, gas exchange (Pn) and chlorophyll fluorescence parameters (Fv/Fm, ΦPSII) decreased under high temperature. It was also found that high temperature caused photoinhibition and a large amount of ROS accumulated, resulting in an increase in MDA and relative conductivity. Antioxidant enzymes (including SOD, POD, CAT, and APX) and antioxidants (including flavonoids, total phenols, and carotenoids) were decreased. The qPCR results further showed that the expression of the PsbP, PsbA, and RubiscoL, SOD, POD, CAT, and APX genes was downregulated, which was consistent with the results of physiological data. Otherwise, the resistance of S. trilobata to high temperature was better than that of S. calendulacea, which made it a superior plant in the invasion area. These results further indicated that the gradual warming of global temperature will greatly accelerate the invasion area of S. trilobata.

Effects of clipping on the growth, gas exchange and chlorophyll fluorescence of invasive plant,Flaveria bidentis

2012 ◽  
Vol 32 (9) ◽  
pp. 2943-2952
Author(s):  
王楠楠 WANG Nannan ◽  
皇甫超河 HUANGFU Chaohe ◽  
陈冬青 CHEN Dongqing ◽  
张天瑞 ZHANG Tianrui ◽  
姜娜 JIANG Na ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Invasive Plant ◽  
Flaveria Bidentis

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 Effect of Foliar and Soil Fertilization with New Products Based on Calcinated Bones on Selected Physiological Parameters of Maize Plants

2020 ◽  
Vol 10 (7) ◽  
pp. 2579 ◽  
Author(s):  
Natalia Matlok ◽  
Małgorzata Szostek ◽  
Piotr Antos ◽  
Grażyna Gajdek ◽  
Józef Gorzelany ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Physiological Parameters ◽  
Initial Growth ◽  
Gas Exchange Parameters ◽  
Soil Fertilization ◽  
Chlorophyll Fluorescence Parameters ◽  
Maize Plants ◽  
The Impact ◽  
Exchange Parameters

This manuscript presents the effect of foliar and soil fertilizer produced from thermally processed bone waste on the initial growth and development of maize plants. The developed fertilizers were tested in three different doses in a pot experiment. Because nutrient deficiency interferes with plant physiological processes, the impact of the developed fertilizers on gas exchange parameters, relative chlorophyll content, and chlorophyll fluorescence parameters were assessed. Based on the conducted research, it was found that fertilization with developed foliar and soil fertilizers increased the relative content of chlorophyll in maize leaves and increased the value of gas exchange parameters and chlorophyll fluorescence. All determined parameters of gas exchange and chlorophyll fluorescence showed a positive correlation depending on the dose of foliar fertilization used (average value r = 0.8414). In turn, the soil fertilization that was utilized during the experiment significantly correlated only with the content of chlorophyll (r = 0.6965). The tested fertilizers improvement of the physiological parameters of the plants, which indicates the fertilizing efficiency of the tested fertilizers.

scholarly journals Variation in Photosynthetic Traits and Correlation with Growth in Teak (Tectona grandis Linn.) Clones

Forests ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 44 ◽  
Author(s):  
Guihua Huang ◽  
Kunnan Liang ◽  
Zaizhi Zhou ◽  
Guang Yang ◽  
Enarth Muralidharan
Keyword(s):  
Genetic Variation ◽  
Chlorophyll Fluorescence ◽  
Gas Exchange ◽  
Growth Traits ◽  
Tectona Grandis ◽  
Field Trials ◽  
Seedling Height ◽  
Chlorophyll Fluorescence Parameters ◽  
Individual Volume ◽  
Improvement Programs

In order to interpret the patterns of genetic variation of photosynthesis and the relationships with growth traits within gene resources of teak (Tectona grandis Linn.), gas exchange, and chlorophyll fluorescence parameters, growth traits of plants in nursery and field trials were measured for 20 teak clones originated from different countries. The results show that there was abundant genetic variation in gas exchange, chlorophyll fluorescence, and growth among the teak clones. The measured traits were found to have generally high heritability (h2) except for intercellular concentration of carbon dioxide (CO2) (Ci). The net photosynthetic rate (Pn), seedling height, and individual volume of wood were significantly correlated with each other, and seedling height was significantly correlated with plant height in field trials, suggesting that Pn and seedling height can be useful in teak breeding. Teak clones 7029, 71-5, 7219, 7412, and 7122, and provenances 3070, 3074, and 3071 had higher photosynthetic rates, and can be regarded as a key resource in teak improvement programs. This work provides useful information for teak breeding and germplasm resource management.

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