The Influence of Blue and Red Light on Seed Development and Dormancy in Nicotiana tabacum L.

Cocco, EmmaLaboratory of Plant Physiology and Photobiology, Department of Life and Environmental Sciences, Università degli Studi di Cagliari, Cagliari, Italy; Laboratory of Economic and Pharmaceutical Botany, Department of Life and Environmental Sciences, Università degli Studi di Cagliari, Cagliari, Italy (author)

The correct development of seeds is a pivotal requirement for species preservation. This process depends on the balance between sensing the environmental stimuli/stressors and hormone-mediated transduction, which results in physiological responses. The red and blue regions of the electromagnetic spectrum are known to influence seed dormancy and germination. Here, we report on the effects induced by the blue (peak at 430 nm) and red (peak at 650 nm) regions of the electromagnetic spectrum on seeds from photo- and skotomorphogenetic capsules developed under white, blue, or red light. Regardless of exposure, seeds from skotomorphogenetic capsules showed an almost absent dormancy in association with altered germination kinetics. Conversely, in seeds from photomorphogenetic capsules, the exposure to the blue region induced skotomorphogenetic-like effects, while the exposure to the whole visible range (350–750 nm), as well as to only the red region, showed a dose-related trend. The observed differences appeared to be dependent on the wavelengths in the red and to be based on transduction mechanisms taking place in fruits. While the molecular bases of this differential effect need to be clarified, the results hint at the role played by different light wavelengths and intensities in seed development and germination. These findings may be relevant for applications in crop production and species safeguarding.

LANTBRUKSVETENSKAPER Bioteknologi med applikationer på växter och djur Växtbioteknologi hsv//swe
AGRICULTURAL SCIENCES Agricultural Biotechnology Plant Biotechnology hsv//eng
dormancy
germination
phytochrome
photomorphogenesis
skotomorphogenesis
Nicotiana tabacum cv. Petit Havana
etiolation
background fluorescence
maximum fluorescence
photosynthetic yield
chlorophyll protein content

Farci, DomenicaUmeå universitet,Kemiska institutionen(Swepub:umu)dofa0017 (author)
Haniewicz, PatrycjaDepartment of Plant Physiology, Warsaw University of Life Sciences—SGGW, Warsaw, Poland (author)
Schröder, Wolfgang P.Umeå universitet,Umeå Plant Science Centre (UPSC),Kemiska institutionen(Swepub:umu)wosc0001 (author)
Maxia, AndreaLaboratory of Economic and Pharmaceutical Botany, Department of Life and Environmental Sciences, Università degli Studi di Cagliari, Cagliari, Italy (author)
Piano, DarioLaboratory of Plant Physiology and Photobiology, Department of Life and Environmental Sciences, Università degli Studi di Cagliari, Cagliari, Italy (author)
Laboratory of Plant Physiology and Photobiology, Department of Life and Environmental Sciences, Università degli Studi di Cagliari, Cagliari, Italy; Laboratory of Economic and Pharmaceutical Botany, Department of Life and Environmental Sciences, Università degli Studi di Cagliari, Cagliari, ItalyKemiska institutionen (creator_code:org_t)

By the author/editor: Cocco, Emma; Farci, Domenica; Haniewicz, Patry ...; Schröder, Wolfga ...; Maxia, Andrea; Piano, Dario

About the subject

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agricultural Bio ...; and Plant Biotechnol ...

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