Izzo, Luigi Gennaro (2018) Improving plant physiological performance and growth by increasing the efficiency of lighting systems. [Tesi di dottorato]


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Item Type: Tesi di dottorato
Lingua: English
Title: Improving plant physiological performance and growth by increasing the efficiency of lighting systems
Izzo, Luigi Gennaroluigigennaro.izzo@unina.it
Date: 11 December 2018
Number of Pages: 140
Institution: Università degli Studi di Napoli Federico II
Department: Agraria
Dottorato: Scienze agrarie e agroalimentari
Ciclo di dottorato: 31
Coordinatore del Corso di dottorato:
D'Urso, Guidodurso@unina.it
Aronne, GiovannaUNSPECIFIED
Date: 11 December 2018
Number of Pages: 140
Uncontrolled Keywords: light quality; LEDs; controlled environment; Space biology; photosynthesis; leaf anatomy; plant tropisms
Settori scientifico-disciplinari del MIUR: Area 05 - Scienze biologiche > BIO/03 - Botanica ambientale e applicata
Date Deposited: 03 Jan 2019 17:14
Last Modified: 22 Jun 2020 09:09
URI: http://www.fedoa.unina.it/id/eprint/12664


Plant cultivation in controlled environment has been grown considerably for commercial vegetable production in addition to research purposes in plant science. In a controlled environment, as well as in nature, light is a main factor affecting plant growth, development, and photosynthetic performance. Therefore, the yield and the quality of plant products are highly dependent on the amount of available light and its spectral composition. Light interaction with plants is not limited to photosynthesis. In addition to light intensity and quality, plants perceive also light direction which is essential in phototropic responses. Light is a major influential stimulus on plant tropisms, together with gravity force, and both compete and interact with each other. Considering plant cultivation in altered-gravity environment such as on the ISS, the moon or mars, light plays an unique role as an external stimulus in shaping the plant in a three-dimensional space through photomorphogenesis and phototropism. However, little is known about the interaction between plant tropisms, especially considering tropic responses of roots, and only recently advances in knowledge have been made thanks to the opportunities to experiment in absence of gravity on the ISS combining the use of LED technology. In this context, a deep understanding of plant responses to the different characteristics of light is needed and the peculiarities of LED technology provide promising opportunities for study and research in the field of plant science. The study and research activities carried out during this Ph.D. program were focused on plant responses to spectral composition of light by using LED technology. More specifically, the studies considered species suitable for plant production in controlled environment, with particular attention to red-leaf or reddish-leaf plants due to their contribution of antioxidant compounds to plant food. Given that the general aim of this Ph.D. was to improve plant cultivation in Space, in addition to studies specifically focused on the effect of light on plant growth, part of the research was dedicated to interactions between light and altered gravity. To perform experiments in altered-gravity conditions it was necessary to use specific facilities such as the International Space Station (ISS), the Large Diameter Centrifuge, and the Random Positioning Machine.

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