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Monochromatic red light during plant growth decreases the size and improves the functionality of stomata in chrysanthemum

Authors :
Mahboobeh Zare Mehrjerdi
Tao Li
Sasan Aliniaeifard
Ernst J. Woltering
Mehdi Seif
Dimitrios Fanourakis
Mostafa Arab
Aida Shomali
Source :
Functional Plant Biology, 48(5), Functional Plant Biology 48 (2021) 5
Publication Year :
2021

Abstract

Light emitting diodes (LEDs) now enable precise light quality control. Prior to commercialisation however, the plant response to the resultant light quality regime ought to be addressed. The response was examined here in chrysanthemum by evaluating growth, chlorophyll fluorescence (before and following water deficit), as well as stomatal anatomy (density, size, pore dimensions and aperture heterogeneity) and closing ability. Plants were grown under blue (B), red (R), a mixture of R (70%) and B (RB), or white (W; 41% B, 39% intermediate spectrum, 20% R) light LEDs. Although R light promoted growth, it also caused leaf deformation (epinasty) and disturbed the photosynthetic electron transport system. The largest stomatal size was noted following growth under B light, whereas the smallest under R light. The largest stomatal density was observed under W light. Monochromatic R light stimulated both the rate and the degree of stomatal closure in response to desiccation compared with the other light regimes. We conclude that stomatal size is mainly controlled by the B spectrum, whereas a broader spectral range is important for determining stomatal density. Monochromatic R light enhanced stomatal ability to regulate water loss upon desiccation.

Details

Language :
English
ISSN :
14454408
Database :
OpenAIRE
Journal :
Functional Plant Biology, 48(5), Functional Plant Biology 48 (2021) 5
Accession number :
edsair.doi.dedup.....ee0d20ceb1dccc565083216a6bf2e0e0