Morphological and physiological properties of indoor cultivated lettuce in response to additional far-red light

Zou, Jie; Zhang, Yating; Zhang, Yuqi; Bian, Zhonghua; Fanourakis, Dimitrios; Yang, Qichang; Li, Tao

doi:10.1016/j.scienta.2019.108725

Cited by 89 publications

(107 citation statements)

References 55 publications

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…Under natural lighting conditions in a greenhouse, Φ PSII of ‘Green Towers’ lettuce decreased asymptotically from 0.81 to ≈0.22 as the PPFD increased from 0 to 1500 µmol m −2 s −1 [ 7 ], while in a separate study Φ PSII of ‘Little Gem’ lettuce decreased to only ≈0.35 at a PPFD of 1500 µmol m −2 s −1 [ 8 ]. For lettuce ‘Tiberius,’ grown under a PPFD of 200 µmol m −2 s −1 , Φ PSII decreased to ≈0.22 at a PPFD of 1400 µmol m −2 s −1 [ 9 ]. This is consistent with our findings that there are substantial differences in the response of Φ PSII and electron transport rate (ETR) to PPFD among lettuce cultivars (unpublished).…”

Section: Introductionmentioning

confidence: 99%

Longer Photoperiods with the Same Daily Light Integral Increase Daily Electron Transport through Photosystem II in Lettuce

Elkins

Iersel

2020

Plants

View full text Add to dashboard Cite

Controlled environment crop production recommendations often use the daily light integral (DLI) to quantify the light requirements of specific crops. Sole-source electric lighting, used in plant factories, and supplemental electric lighting, used in greenhouses, may be required to attain a specific DLI. Electric lighting is wasteful if not provided in a way that promotes efficient photochemistry. The quantum yield of photosystem II (ΦPSII), the fraction of absorbed light used for photochemistry, decreases with increasing photosynthetic photon flux density (PPFD). Thus, we hypothesized that the daily photochemical integral (DPI), the total electron transport through photosystem II (PSII) integrated over 24 h, would increase if the same DLI was provided at a lower PPFD over a longer photoperiod. To test this, ΦPSII and the electron transport rate (ETR) of lettuce (Lactuca sativa ‘Green Towers’) were measured in a growth chamber at DLIs of 15 and 20 mol m−2 d−1 over photoperiods ranging from 7 to 22 h. This resulted in PPFDs of 189 to 794 μmol m−2 s−1. The ΦPSII decreased from 0.67 to 0.28 and ETR increased from 55 to 99 μmol m−2 s−1 as PPFD increased from 189 to 794 μmol m−2 s−1. The DPI increased linearly as the photoperiod increased, but the magnitude of this response depended on DLI. With a 7-h photoperiod, the DPI was ≈2.7 mol m−2 d−1, regardless of DLI. However, with a 22-h photoperiod, the DPI was 4.54 mol m−2 d−1 with a DLI of 15 mol m−2 d−1 and 5.78 mol m−2 d−1 with a DLI of 20 mol m−2 d−1. Our hypothesis that DPI can be increased by providing the same DLI over longer photoperiods was confirmed.

show abstract

Section: Introductionmentioning

confidence: 99%

Longer Photoperiods with the Same Daily Light Integral Increase Daily Electron Transport through Photosystem II in Lettuce

Elkins

Iersel

2020

Plants

View full text Add to dashboard Cite

show abstract

“…Cultivation of vegetable crops inside a controlled environment chamber and extracting leaf canopy signatures that holds essential information for crop phenotyping has captivated agriculturist and scientist for quite a few generations (Burgos-Artizzu, Ribeiro, Guijarro, & Pajares, 2011;Calangian et al, 2018;de Luna, Dadios, Bandala, & Vicerra, 2019;Hang, Lu, Takagaki, & Mao, 2019;Loresco, Valenzuela, Culaba, & Dadios, 2019;Zou et al, 2019). In this study, it is shown that indoor hydroponic lettuce canopy area can be measured based on numerical image textural feature analysis of Haralick and gray level co-occurrence matrix (Table 1) as compared with morphological pixel feature (Calangian et al, 2018), leaf shape (Saleem, Akhtar, Ahmed, & Qureshi, 2019) and point cloud analysis (Berk, Stajnko, Belsak, & Hocevar, 2020).…”

Section: Results Of Thresholding For Image Segmentation On Lettucementioning

confidence: 95%

“…Broader leaf corresponds to maturity as part of its phenological development. Several studies have already developed a non-destructive approach on estimating individual leaf area of carrot (Haug & Ostermann, 2015), cauliflower (Hamuda, Mc Ginley, Glavin, & Jones, 2017), cucumber (Xie et al, 2014), lettuce (Hernández-Hernández et al, 2016;Tian & Wang, 2009;Zou et al, 2019), maize (Burgos-Artizzu, Ribeiro, Guijarro, & Pajares, 2011), potato (Boyd, Gordon, & Martin, 2002), radish (Dang et al, 2018), sugar beet (Chebrolu et al, 2017) and tomato (Boulard, Roy, Pouillard, Fatnassi, & Grisey, 2017;de Luna, Dadios, Bandala, & Vicerra, 2019) considering the length and width of the leaf shape (Saleem, Akhtar, Ahmed, & Qureshi, 2019;Wang, Jin, Shi, & Liu, 2019).…”

Section: Introductionmentioning

confidence: 99%

Lettuce Canopy Area Measurement Using Static Supervised Neural Networks Based on Numerical Image Textural Feature Analysis of Haralick and Gray Level Co-Occurrence Matrixs

et al. 2020

View full text Add to dashboard Cite

Journal of Agricultural Science www.agrivita.ub.ac.id based on the Bureau of Plant Industry-National Crop Research and Development Center (BPI-NCRDC) of the Department of Agriculture (DOA) due to its significant impact on medicinal, culinary, and health perspectives. Loose-leaf lettuce makes up its harvest growth stage after 45 to 90 days after transplanting that normally takes 12 to 14 days from germination. The sensitive way of growing lettuce is inclusive to the beneficial application of smart farming (Ge, Zhou, Kellomäki, Peltola, & Wang, 2011; Jindarat & Wuttidittachotti, 2015). It also demands a heuristic approach of monitoring to enhance its agricultural process. The lettuce growth, similar to the other higher value leafy crops, is primarily affected by light-dependent and gas-dependent reactions. The growth and development changes are verified to the changes occurred on its fresh weight, dry weight, volume, height, surface area, root zone depth ARTICLE INFO

show abstract

“…An essential role of FR light for improving the production of indoor cultivated lettuce has been demonstrated in an experiment done by Zou et al (2019). Adding 50 µmol m -2 s -1 of FR light to 200 µmol m -2 s -1 of R + B, applied during the day (16 h) or as EOD (1 h), resulted in 39 % and 25 % increase in total biomass.…”

Section: Fr and Yield Qualitymentioning

confidence: 98%

The role of far-red light (FR) in photomorphogenesis and its use in greenhouse plant production

Kump

2020

AAS

View full text Add to dashboard Cite

<p>Light energy is one of the most important factors regulating the growth and development of plants. In greenhouses and other controlled- environments in which the natural radiation intensities are often low, plant production relies on supplementary lighting to optimize the photosynthesis, increase production levels, and enable year-round production. For a long time, the research related to artificial lighting sources focused on the optimization of the efficiency of use for photosynthesis. The quality of light in plant production has been widely addressed only recently with the development of advanced LED technology that is energy efficient and enables the control of the spectral composition of light. Red and far-red light are sensed by the phytochromes that trigger several morphological and developmental processes that impact productivity and yield quality. Thus, to efficiently exploit all the advantages of LEDs and to develop LED arrays for specific plant applications, it is essential to understand thoroughly how light quality influences plant growth and development. This paper presents an overview of the recent developments in light quality manipulation, focusing on far-red light and the R: FR ratio, to improve yield and quality of products and to manage plant architecture and flowering in vegetable and ornamental horticulture.</p>

show abstract

Morphological and physiological properties of indoor cultivated lettuce in response to additional far-red light

Cited by 89 publications

References 55 publications

Longer Photoperiods with the Same Daily Light Integral Increase Daily Electron Transport through Photosystem II in Lettuce

Longer Photoperiods with the Same Daily Light Integral Increase Daily Electron Transport through Photosystem II in Lettuce

Lettuce Canopy Area Measurement Using Static Supervised Neural Networks Based on Numerical Image Textural Feature Analysis of Haralick and Gray Level Co-Occurrence Matrixs

The role of far-red light (FR) in photomorphogenesis and its use in greenhouse plant production

Contact Info

Product

Resources

About