Monitoring the development of cotton (gossipier barbdense l.) using emission spectra of chlorophyll fluorescence
Joint Authors
Ahmad, A. M.
Kafi, S. T.
Medani, I. M. K.
Ali, A. K. Sabir
Source
Issue
Vol. 2, Issue 2 (31 Aug. 2009), pp.103-111, 9 p.
Publisher
Yarmouk University Deanship of Research and Graduate Studies
Publication Date
2009-08-31
Country of Publication
Jordan
No. of Pages
9
Main Subjects
Topics
Abstract EN
This work was proposed to monitor the growth and development of cotton(Gossypium barbadense L.) under different environmental conditions using emission spectra of chlorophyll a fluorescence from the intact leaves.
The emitted fluorescence signal by cotton plants was measured using spectrometer/graphic and data analysis software.
Cotton was grown in the summer season under sunlight exposure i.e.
summer conditions, whereas in winter conditions the plants were grown in a shaded area.
Both groups of plants were irrigated by tap water.
Winter conditions exhibit environmental stress of temperature and light intensity.
Monochromatic blue light of 450 nm was used as an excitation source to induce the chlorophyll fluorescence emission at 685 nm and 733 nm.
The peak intensity ratio (P.I.R.), which is the ratio between maximum emitted light intensities at 685 nm and 733 nm respectively (IF685/IF733), and the area ratio (A.R.) which is the ratio between the areas under the curves of the two emission lines were used for monitoring the development of cotton, from the germination until the flowering.
The results revealed that the summer conditions gave a faster seed germination rate and the best growth and development of cotton, while the stressing winter conditions expressed in delayed seed germination, poor growth that led to failure of flowering and immaturity.
The peak intensity ratio and area ratio for the summer and winter conditions were found to follow linear relationships.
The line slopes of the peak intensity ratio and area ratios were1.36 and 0.46 and the intercepts were 0.04 and 0.04 respectively.
American Psychological Association (APA)
Kafi, S. T.& Medani, I. M. K.& Ahmad, A. M.& Ali, A. K. Sabir. 2009. Monitoring the development of cotton (gossipier barbdense l.) using emission spectra of chlorophyll fluorescence. Jordan Journal of Physics،Vol. 2, no. 2, pp.103-111.
https://search.emarefa.net/detail/BIM-266241
Modern Language Association (MLA)
Ahmad, A. M.…[et al.]. Monitoring the development of cotton (gossipier barbdense l.) using emission spectra of chlorophyll fluorescence. Jordan Journal of Physics Vol. 2, no. 2 (2009), pp.103-111.
https://search.emarefa.net/detail/BIM-266241
American Medical Association (AMA)
Kafi, S. T.& Medani, I. M. K.& Ahmad, A. M.& Ali, A. K. Sabir. Monitoring the development of cotton (gossipier barbdense l.) using emission spectra of chlorophyll fluorescence. Jordan Journal of Physics. 2009. Vol. 2, no. 2, pp.103-111.
https://search.emarefa.net/detail/BIM-266241
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 110-111
Record ID
BIM-266241