Influence of Continuous Spectrum Light on Morphological Traits and Leaf Anatomy of Hazelnut Plantlets
| Autor: | Maria Eugenia Caceres, Valerio Cristofori, Cristian Silvestri, Eddo Rugini, Marilena Ceccarelli, Aniello Luca Pica |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine platelets quality Biomass Plant Science Biology lcsh:Plant culture 01 natural sciences Palisade cell Acclimatization 03 medical and health sciences plantlets quality nursery lcsh:SB1-1110 Cultivar Original Research Plant stem Corylus avellana L. light emitting diodes platelets quality morphological traits leaf anatomy nursery Corylus avellana L food and beverages Far-red Corylus avellana L. light emitting diodes plantlets quality morphological traits leaf anatomy nursery light emitting diodes Chloroplast Horticulture 030104 developmental biology Shoot morphological traits leaf anatomy 010606 plant biology & botany |
| Zdroj: | Frontiers in Plant Science, Vol 10 (2019) Frontiers in Plant Science |
| DOI: | 10.3389/fpls.2019.01318/full |
| Popis: | Light spectra influence growth, development, and quality of plants and seedlings, that is one of the main aspects engaging the interests of private and public researchers and nursery industries. Propagation of hazelnut (Corylus avellana L.), which in the past has been held in low consideration because of the widespread use of rooted suckers directly collected in the field, today is taking on increasing interest due to the strong expansion of hazelnut cultivation. In order to improve the quality of plants and seedlings in greenhouse acclimatization, the effects of light emitting diodes (LED) lights during the ex vitro growth of two hazelnut cultivars (Tonda di Giffoni and Tonda Gentile Romana) were investigated. Plantlets were maintained in a growth chamber and exposed to three different continuous spectrum LED systems as a primary source of illumination and to fluorescent lamps used as control. LEDs differed in the percentage of some wavelength ranges in the spectrum, being AP673L rich in green and red wavelengths, NS1 in blue and green light, G2 in red and far red wavelengths. After a 4-week experimental period, morphometric, biochemical, and histological analyses were carried out. Shoot and leaf growths were influenced by LEDs more than by fluorescent lamps in both cultivars. G2 positively affected biomass increment more than the other LEDs, by inducing not only cell elongation (increase in shoot length, new internodes length, leaf area) but also cell proliferation (increase in new node number). G2 exposure had negative effects on total chlorophyll content but positively affected synthesis of flavonoids in both varieties; therefore, plants grown under this LED showed the lowest nitrogen balance index. Leaf morpho-anatomical analyzed traits (thickness, palisade cell height, number of chloroplasts, number of palisade cells), were influenced especially by G2 and, to a less extent, by NS1 light. Significant differences in some parameters were observed between the two cultivars in response to a same light source. The results obtained underline the importance of light modulation for hazelnut, providing useful information for ex vitro growth of hazelnut plantlets. © Copyright © 2019 Silvestri, Caceres, Ceccarelli, Pica, Rugini and Cristofori. |
| Databáze: | OpenAIRE |
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