Modeling the canopy photosynthetic rate of romaine lettuce (Lactuca sativa L.) grown in a plant factory at varying CO2 concentrations and growth stages

Energy demand of greenhouses is an important factor for their economics and photovoltaics can be considered an alternative solution to cover their electrical and heating needs. On the other hand, plants cultivated under different solar radiation intensities usually appear different physiological adaptations. The objective of this research was to investigate the effect of photovoltaic panels’ induced partial shading on growth and physiological characteristics of lettuce (Lactuca sativa L.) and rocket (Eruca sativa Mill.) plants. Our results indicate that lettuce productivity and the corresponding photosynthetic rate were not affected under the photovoltaic cultivation in comparison with the reference one. On the other hand, the rocket cultivation was less productive and showed lower photosynthetic rate under photovoltaic panels than in the reference greenhouse. The different physiological response between lettuce and rocket seems to be associated with the effect of environmental factors such as solar radiation intensity, temperature and humidity apart from the possible inherent characteristics of each plant species.

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Effect of Methyl Jasmonate on Phenolic Compounds and Carotenoids of Romaine Lettuce (Lactuca sativa L.)

Journal of Agricultural and Food Chemistry ◽

10.1021/jf071927m ◽

2007 ◽

Vol 55 (25) ◽

pp. 10366-10372 ◽

Cited By ~ 71

Author(s):

Hyun-Jin Kim ◽

Jorge M. Fonseca ◽

Ju-Hee Choi ◽

Chieri Kubota

Keyword(s):

Phenolic Compounds ◽

Methyl Jasmonate ◽

Lactuca Sativa ◽

Romaine Lettuce ◽

Lactuca Sativa L

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Supplemental upward LED lighting for growing romaine lettuce (Lactuca sativa) in a plant factory: cost performance by light intensity and different light spectra

Acta Horticulturae ◽

10.17660/actahortic.2018.1227.79 ◽

2018 ◽

pp. 623-630

Author(s):

S. Saengtharatip ◽

N. Lu ◽

M. Takagaki

Keyword(s):

Light Intensity ◽

Lactuca Sativa ◽

Romaine Lettuce ◽

Cost Performance ◽

Led Lighting ◽

Light Spectra ◽

Plant Factory

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Differential Probing Response of Serpentine Leafminer, Liriomyza trifolii (Burgess), on Cos Lettuce

Journal of Entomological Science ◽

10.18474/0749-8004-29.3.330 ◽

1994 ◽

Vol 29 (3) ◽

pp. 330-338 ◽

Cited By ~ 6

Author(s):

Gregg S. Nuessly ◽

Russell T. Nagata

Keyword(s):

Lactuca Sativa ◽

Leaf Surface ◽

The Other ◽

Leafy Vegetables ◽

Liriomyza Trifolii ◽

Romaine Lettuce ◽

Lactuca Sativa L ◽

Leaf Mining ◽

Choice Tests ◽

Serpentine Leafminer

Leaf mining damage by serpentine leafminers, Liriomyza trifolii (Burgess) (Diptera: Agromyzidae), is a major problem of many leafy vegetables especially lettuce. A hierarchy of leaf probing preference by L. trifolii on romaine lettuce (Lactuca sativa L.) cultivars ‘Floricos 83’ (FC), ‘Parris Island Cos’ (PI), ‘Tall Guzmaine’ (TG), and ‘Valmaine’ (VL) was determined. Based on stipple counts (puncture wounds in the leaf surface), L. trifolii preferred TG by an experiment-wide average of 3:1 over the other cultivars. In choice tests where L. trifolii were able to select their preferred cultivar, TG was preferred 2.2:1 to 5.5:1 over the over varieties. On 12-leaf stage TG plants, eight female flies produced means ± SEM of 664.2 ± 165.8, 1,581.8 ± 333.8, and 2,084.5 ± 242.6 stipples per plant after 24, 48, and 72 h exposures, respectively. Preference for TG was maintained in no-choice tests where TG was preferred 1.8:1 to 2.6:1 over the other cultivars. Stipple counts on FC, PI, and VL did not vary significantly between choice and no-choice tests, but nearly twice as many stipples per plant were found on TG in choice than in no-choice tests. More probing occurred on all cultivars on the youngest fully expanded leaves in the middle of the plants than on leaves toward the bottom or top of the plants. Preference for these middle leaves was more pronounced on TG than on the other cultivars. The differences in stipple rates followed the pedigrees of the cultivars tested. The character(s) preferred by L. trifolii were apparently introduced into the lineage with a cross to ‘Paris White.’

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OPTIMIZATION OF IRRIGATION OF ROMAINE LETTUCE (LACTUCA SATIVA L.) CULTIVATED IN MUCK SOIL

Acta Horticulturae ◽

10.17660/actahortic.2011.893.133 ◽

2011 ◽

pp. 1155-1160 ◽

Cited By ~ 1

Author(s):

L. Plamondon ◽

L. Gaudreau ◽

A. Gosselin ◽

J. Caron ◽

D. Van Winden ◽

...

Keyword(s):

Lactuca Sativa ◽

Romaine Lettuce ◽

Lactuca Sativa L ◽

Muck Soil

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Assessment of Contamination Potential of Lettuce by Salmonella enterica Serovar Newport Added to the Plant Growing Medium

Journal of Food Protection ◽

10.4315/0362-028x-70.7.1717 ◽

2007 ◽

Vol 70 (7) ◽

pp. 1717-1722 ◽

Cited By ~ 44

Author(s):

NIRIT BERNSTEIN ◽

SHLOMO SELA ◽

SARIT NEDER-LAVON

Keyword(s):

Developmental Stage ◽

Root System ◽

Lactuca Sativa ◽

Salmonella Enterica ◽

Romaine Lettuce ◽

Salmonella Newport ◽

Aerial Parts ◽

Lactuca Sativa L ◽

Growing Medium

The capacity of Salmonella enterica serovar Newport to contaminate Romaine lettuce (Lactuca sativa L. cv. Nogal) via the root system was evaluated in 17-, 20-, and 33-day-old plants. Apparent internalization of Salmonella via the root to the above-ground parts was identified in 33- but not 17- or 20-day-old plants and was stimulated by root decapitation. Leaves of lettuce plants with intact and damaged roots harbored Salmonella at 500 ± 120 and 5,130 ± 440 CFU/g of leaf, respectively, at 2 days postinoculation but not 5 days later. These findings are first to suggest that Salmonella Newport can translocate from contaminated roots to the aerial parts of lettuce seedlings and propose that the process is dependent on the developmental stage of the plant.

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