Change the chlorophyll content index of five plant species under different light regimes established in a neotropical understory of Venezuela
DOI:
https://doi.org/10.18636/bioneotropical.v8i4.761Keywords:
Chlorophyll, Chlorophyll meter, Ecological studies, MCC-200 Opti-SciencesAbstract
Objective: To evaluate the chlorophyll content index (CCI) in field conditions as an indicator of acclimatization in changes in the light environment. Methodology: with the use of portable chlorophyll meter MCC-200 Opti-Sciences two experiences were carried out; the first consisted in determining the CCI in plants under conditions contrasting light, shade and full solar exposure, using four species of the order Zingiberales Heliconia bihai, Heliconia latispatha, Heliconia platystachys and Calathea lutea. The results were analyzed through the Mann-Whitney U test. The second experience consisted of evaluating if the values of the CCI change throughout the day, product of changes in the optical properties of the leaf, using the species Syngonium vellozianum (Family: Araceae). Twelve individuals were selected for each light condition and measurements were taken once a month for three continuous months, measurements were taken at 10:00, 12:00, 14:00 and 16:00 h. The results were analyzed through a Kruskal-Wallis statistical test. Results: for the four species studied, a different CCI was recorded between the shade and sun populations (P <0.05), being in all cases greater for the shade, on the other hand, the changes throughout the day in S. vellozianum no presentation significant difference (P> 0.05). Conclusion: The CCI in the plants studied under field conditions is a good indicator of acclimatization to light changes and allows measuring the adjustment of the chlorophyll content over time in field conditions.
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