Doses of caffeine on the development and performance of pepper crops under greenhouse

Abstract

A number of experiments on plant organs demonstrated that caffeine acts as a growth stimulator. In this study we aimed to determine the influence of caffeine on development of pepper crops under stress in the autumn-winter cycle, as peppers stop growing and developing in November and January. The experiments were conducted to determine how caffeine applied to the soil by fertigation, with doses of 2.25 µM and 9.00 µM for T1 and T2, respectively, compared to the control crop, affect the morphological development and performance of the pepper crops during two crop cycles (2008-2009 and 2009-2010 in autumn-winter). Throughout the whole vegetative plant cycle, performance parameters of fruit quality and the influence on the morphological development were obtained on different dates. With respect to the remainder of the morphological and production parameters, no significant differences were discovered in either of the evaluated cycles, thus leading to the conclusion that the two doses of caffeine, 2.25 µM and 9.00 µM, did not have any stimulant effect on the development and performance of the pepper crop during both cycles. Total yields were unaffected by either treatment, 4.89, 4.90 and 4.88 kg/m2 for the first assay and 5.28, 5.23 and 5.28 for the second, for treatments control and caffeine dosses 2.25 µM y 9.00 µM respectively.

Physio-anatomical responses of tobacco under caffeine stress

“…Previous studies of the effect of caffeine on a diversity of crops reported contradictory effects on plant growth, acting both as an enhancer or inhibitor of growth. This could be due to application of different caffeine concentrations, different periods of application, or examining effects on different plant organs (Montes et al 2014). Khanam et al (2000) reported that in Duboisia myoporoides tropane alkaloids were localized in the xylem cells of roots.…”

“…However, the physiology of caffeine in plants is poorly understood. Several plant studies suggested that exogenous and/or endogenous caffeine may act as a growth enhancer, while others demonstrated its function as a plant growth inhibitor (Montes et al 2014).…”

Metabolomic exploration of CTC tea manufacturing waste validates its potentiality as organic fertilizer

“…Caffeine, the other key component of the tea waste extract, can also degrade into xanthine and further urea (Mazzafera, 2002) just like xanthosine. Caffeine has already been recognized as a potential priming agent for seed germination (Ransom, 1912) and plant growth promoter as well, but there are mixed opinions (Montes, 2014).…”