Analysis fossintetic pigments of genotype ps1319 cocoa seedlings submitted to different irrigation depth
International Journal of Development Research
Analysis fossintetic pigments of genotype ps1319 cocoa seedlings submitted to different irrigation depth
Received 08th May, 2019; Received in revised form 17th June, 2019; Accepted 03rd July, 2019; Published online 28th August, 2019
Copyright © 2019, Vinicius de Souza Oliveira et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Water availability is one of the main factors that affect the production of high quality cocoa (Theobroma cacao L.) seedlings. Determination of photosynthetic pigment content is important because it changes when plants are subjected to stress. Thus, the objective of this study was to evaluate the effect of different irrigation depths on the photosynthetic pigments content in genotype PS1319 cocoa seedlings. For this, five treatments consisting of different irrigation depths were applied: 4, 6, 8, 10 and 12 mm d-1 in a completely randomized experimental design with 20 seedlings per treatment. From leaf discs, photosynthetic pigments were extracted and analyzed by spectrophotometer to obtain the content of chlorophyll a, chlorophyll b and carotenoid. The total chlorophyll content was obtained by summing the chlorophyll a content and chlorophyll b content. The irrigation depth of 7.97 mm d-1 is the most efficient, since for practical and economic purposes it consumes the least amount of water, being the most recommended for the cocoa genotype PS1319 when it is desired to obtain better yields of pigment contents. photosynthetic.
