Next Article in Journal
Growing Conditions Affect the Phytochemical Composition of Edible Wall Rocket (Diplotaxis erucoides)
Next Article in Special Issue
Optimal LED Wavelength Composition for the Production of High-Quality Watermelon and Interspecific Squash Seedlings Used for Grafting
Previous Article in Journal
Prediction Models for Bioavailability of Mn, Cu, Zn, Ni and Pb in Soils of Republic of Serbia
Open AccessArticle

Both Multi-Segment Light Intensity and Extended Photoperiod Lighting Strategies, with the Same Daily Light Integral, Promoted Lactuca sativa L. Growth and Photosynthesis

by Hanping Mao 1,*, Teng Hang 1,2, Xiaodong Zhang 1 and Na Lu 2,*
1
School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
2
Center for Environment, Health and Field Sciences, Chiba University, Kashiwa-no-ha 6-2-1, Kashiwa, Chiba 277-0882, Japan
*
Authors to whom correspondence should be addressed.
Agronomy 2019, 9(12), 857; https://doi.org/10.3390/agronomy9120857
Received: 15 November 2019 / Revised: 5 December 2019 / Accepted: 5 December 2019 / Published: 6 December 2019
(This article belongs to the Special Issue Control of LED Lighting Based on Plant Physiological Principles)
With the rise of plant factories around the world, more and more crops are cultivated under artificial light. Studies on effects of lighting strategies on plant growth, such as different light intensities, photoperiods, and their combinations, have been widely conducted. However, research on application of multi-segment light strategies and associated plant growth mechanisms is still relatively lacking. In the present study, two lighting strategies, multi-segment light intensity and extended photoperiod, were compared with a constant light intensity with a 12 h light/12 h dark cycle and the same daily light integral (DLI). Both lighting strategies promoted plant growth but acted via different mechanisms. The multi-segment light intensity lighting strategy promoted plant growth by decreasing non-photochemical quenching (NPQ) of the excited state of chlorophyll and increasing the quantum yield of PSII electron transport (PhiPSII), quantum yield of the carboxylation rate (PhiCO2), and photochemical quenching (qP), also taking advantage of the circadian rhythm. The extended photoperiod lighting strategy promoted plant growth by compensating for weak light stress and increasing light-use efficiency by increasing chlorophyll content under weak light conditions. View Full-Text
Keywords: photoperiod; weak light stress; circadian rhythm; chlorophyll fluorescence; photosynthesis; Lactuca sativa L. photoperiod; weak light stress; circadian rhythm; chlorophyll fluorescence; photosynthesis; Lactuca sativa L.
Show Figures

Figure 1

MDPI and ACS Style

Mao, H.; Hang, T.; Zhang, X.; Lu, N. Both Multi-Segment Light Intensity and Extended Photoperiod Lighting Strategies, with the Same Daily Light Integral, Promoted Lactuca sativa L. Growth and Photosynthesis. Agronomy 2019, 9, 857.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop