The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)

The interactive effects of carbon dioxide (CO2) and bicarbonate (HCO3-) on a tropical submerged species: Egeria densa Planchon (Hydrocharitaceae) was studied. A factorial combination of two concentrations of CO2 (370 ppm and 2,000 ppm) and three concentrations of HCO3- (0.1 mM, 0.85 mM and 1.7 mM) w...

Full description

Saved in:
Bibliographic Details
Main Author: Arunothai Jampeetong
Format: Journal
Published: 2018
Subjects:
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78249263219&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/50540
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
id th-cmuir.6653943832-50540
record_format dspace
spelling th-cmuir.6653943832-505402018-09-04T04:53:19Z The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae) Arunothai Jampeetong Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy The interactive effects of carbon dioxide (CO2) and bicarbonate (HCO3-) on a tropical submerged species: Egeria densa Planchon (Hydrocharitaceae) was studied. A factorial combination of two concentrations of CO2 (370 ppm and 2,000 ppm) and three concentrations of HCO3- (0.1 mM, 0.85 mM and 1.7 mM) were set at the same condition of light intensities (300 μmol m-2s-1) and temperature (23oC). The relative growth rate (RGR) and some morphological characteristics were measured after 14 days. A significant difference in RGR, shoot growth rate based on shoot length (SGR), number of new roots, and new shoots between plants treated by low and high CO2 concentration were observed. The results indicate that the concentrations of both CO2 and HCO3- affected growth. At low concentrations of CO2 and HCO3- there was the lowest RGR, growth rate, and production of new shoots and roots. At the high CO2 concentration, the results showed the growth of plants will decrease when the HCO3- concentration was low. The ability of E. densa to use HCO3- as an inorganic carbon source for photosynthesis was studied by a pH-drift experiment. Small E. densa shoots (1-1.5 cm long) were incubated in 30 ml glass-stoppered bottles with a growth medium containing 0.8 mmol l-1 of HCO3- at 23 oC and 300 μmol m-2s-1 of light for 20 hours. The final pH, which was 10.13-10.78, showed that E. densa can take up HCO3-, after an attended treatment at a high CO2 concentration. Moreover, the effect of HCO3- on photosynthetic oxygen production was studied at low (50 μmol m-2s-1) and high (300 μmol m- 2s-1) light intensities. The rate of photosynthesis increased when the concentration of HCO3- was increased. Furthermore, the photosynthetic rate at the high light intensity condition was 10 times greater than at the low light intensity condition. 2018-09-04T04:42:06Z 2018-09-04T04:42:06Z 2010-09-01 Journal 01252526 2-s2.0-78249263219 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78249263219&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50540
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
spellingShingle Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
Arunothai Jampeetong
The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)
description The interactive effects of carbon dioxide (CO2) and bicarbonate (HCO3-) on a tropical submerged species: Egeria densa Planchon (Hydrocharitaceae) was studied. A factorial combination of two concentrations of CO2 (370 ppm and 2,000 ppm) and three concentrations of HCO3- (0.1 mM, 0.85 mM and 1.7 mM) were set at the same condition of light intensities (300 μmol m-2s-1) and temperature (23oC). The relative growth rate (RGR) and some morphological characteristics were measured after 14 days. A significant difference in RGR, shoot growth rate based on shoot length (SGR), number of new roots, and new shoots between plants treated by low and high CO2 concentration were observed. The results indicate that the concentrations of both CO2 and HCO3- affected growth. At low concentrations of CO2 and HCO3- there was the lowest RGR, growth rate, and production of new shoots and roots. At the high CO2 concentration, the results showed the growth of plants will decrease when the HCO3- concentration was low. The ability of E. densa to use HCO3- as an inorganic carbon source for photosynthesis was studied by a pH-drift experiment. Small E. densa shoots (1-1.5 cm long) were incubated in 30 ml glass-stoppered bottles with a growth medium containing 0.8 mmol l-1 of HCO3- at 23 oC and 300 μmol m-2s-1 of light for 20 hours. The final pH, which was 10.13-10.78, showed that E. densa can take up HCO3-, after an attended treatment at a high CO2 concentration. Moreover, the effect of HCO3- on photosynthetic oxygen production was studied at low (50 μmol m-2s-1) and high (300 μmol m- 2s-1) light intensities. The rate of photosynthesis increased when the concentration of HCO3- was increased. Furthermore, the photosynthetic rate at the high light intensity condition was 10 times greater than at the low light intensity condition.
format Journal
author Arunothai Jampeetong
author_facet Arunothai Jampeetong
author_sort Arunothai Jampeetong
title The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)
title_short The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)
title_full The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)
title_fullStr The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)
title_full_unstemmed The interactive effects of inorganic carbon and light on a tropical submerged macrophyte: Egeria densa planchon (hydrocharitaceae)
title_sort interactive effects of inorganic carbon and light on a tropical submerged macrophyte: egeria densa planchon (hydrocharitaceae)
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78249263219&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/50540
_version_ 1681423608267669504