Correlação de Pearson entre pigmentos fotossintetizantes e fitomassa de plantas de Aloysia triphylla

Abstract

Thiesen, L. A.; Pinheiro, M. V. M.; Holz, E.; Fontana, D. C.; Santos, J. dos 249 Journal of Environmental Analysis and ProgressJournal homepage: www.jeap.ufrpe.br/ http://dx. A B S T R A C TThe dry matter production of the crops is limited by the photosynthetic pigments, an indicator of productivity that may be restricted to the growth and development of plants. The objective of the study was to determine a correlation between photosynthetic pigments and a phytomass of Aloysia triphylla in response to different water availability. The experiment was carried out in a protected environment at the Federal University of Santa Maria, Campus Frederico Westphalen. It was conducted in a randomized block design with four treatments, four blocks and the experimental unit composed of 16 plants/block, in the period of August 28, 2015, to March 21, 2016. The treatments consisted of different levels of water availability (100, 75, 50 and 25% of the soil field capacity). They were evaluated: Chlorophyll a, chlorophyll b, carotenoids, total chlorophyll, chlorophyll a/b ratio, total chlorophyll/carotenoid ratio and total dry matter, dry mass of leaves and stem. Data were submitted to Pearson's linear correlation aiming to verify the dependence of one variable on another. After 152 days, it was possible to observe that there was a high and positive correlation between chlorophyll a and b, both of which presented a negative correlation with the chlorophyll a/b ratio. Chlorophyll b showed correlation with total phytomass and leaves. It was also observed that total chlorophyll showed correlation with all variables, except for those of stem and leaf dry matter and total phytomass. It was concluded that chlorophyll b presents positive correlation with dry leaf mass and total dry matter, and the leaf dry mass has a positive correlation with dry stem mass and total phytomass of A. triphylla.

Desenvolvimento vegetativo e índices de clorofila de clones-copa de Bertholletia excelsa Bonpl., em Roraima

“…As correlações obtidas entre as variáveis de crescimento CBP e DBP e as variáveis IChla, IChlb, IChlab podem predizer como estão os ajustes fotossintéticos das plantas em relação ao ambiente de crescimento (Engel & Poggiani, 1991). Essas correlações elevadas indicam que, quanto mais clorofila, mas energia e maior o crescimento da planta (Thiesen et al, 2017). As correlações entre estes dois grupos de variáveis (crescimento e índices de clorofila) podem ser aumentadas em virtude de maior demanda nutricional, em especial o nitrogênio, que nas folhas são integrantes de enzimas que estão associadas aos cloro-plastos (Salisbury & Ross, 2012).…”

Determinação Do Teor De Clorofila Dos Extratos Das Folhas De Piper Marginatum Jacq Coletadas Em Itacoatiara Por Meio Da Espectrofotometria Uv-Vis.

“…O gênero Piper possui em suas folhas um elevado teor de clorofila o que confere a coloração verde e muitas das vezes este teor não é quantificado e dentre as técnicas utilizadas para se analisar o teor da concentração de clorofila destaca-se a técnica de Espectrofotometria no UV-Vis (THIESEN, 2017;LORENZEN, 1967).…”