Light-Quality Manipulation by Horticulture Industry

Rajapakse, Nihal C.; Shahak, Yosepha

doi:10.1002/9780470988893.ch12

Cited by 55 publications

(35 citation statements)

References 62 publications

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“…From the photo-morphogenetic point of view, the PHY and CRY action could be also involved (Rajapakse and Shahak, 2007). Solomakhin and Blanke (2008) underlined the possible role PHY on vegetative growth and development of apple trees grown under colored nets, but the R/FR ratio (principal component of PHY activity) does not change widely among colored nets.…”

Section: Manipulation Of Light Quality In Orchard Systemsmentioning

confidence: 99%

“…Nevertheless, due to the difficulty of conditioning the light environment of orchards, the management of light quality has been much less developed in fruit trees grown under field conditions, consequently more studied have been developed under controlled conditions (Erez and Kadman-Zahavi, 1972;Baraldi et al, 1994;1998;Rapparini et al, 1999). Since in recent years, manipulation of plant responses by changes in the light quality composition promises to provide new technological alternatives for sustainable manipulation of growth, yield, and quality of harvest in agricultural and horticultural crops (Devlin et al, 2007;Rajapakse and Shahak, 2007), the purpose of this article was to review the current status on light quality management in fruit trees under field conditions, with emphasis in physiological and technological aspects and its potential application for manipulation of plant growth, productivity, and quality in orchard systems.…”

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confidence: 99%

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Light quality management in fruit orchards: physiological and technological aspects

Bastías

Grappadelli

2012

Chilean J. Agric. Res.

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Light quality (sunlight spectrum) management promises to provide a new technological alternative to sustainable production in horticultural crops. However, little information exists about physiological and technological aspects on light quality management in fruit crops. Sunlight composition changes widely in orchard canopies, inducing different plant responses in fruit trees mediated by phytochrome (PHY) and cryptochrome (CRY) activity. High proportion of far-red (FR) in relation to red (R) light increases shoot elongation, while blue (B) light induces shoot dwarfing. Red and ultraviolet (UV) light increases fruit skin anthocyanin synthesis, while FR light shows a negative effect. Red and B light can also alter leaf morpho-physiological traits in fruit trees, such palisade thickness, stomatal aperture, and chlorophyll content. Besides improvement of photosynthetically active radiation (PAR) availability, the use of reflective films improves UV and R light proportion, with positive effects on PHY mediated-responses (fruit color, fruit weight, shoot growth), as reported in apple ( Mechanisms of colored nets seem to be associated to photosynthetic and morphogenetic process regulated by PAR availability, R/B light proportion, and CRY activity. Alteration of light quality affects significantly fruit tree plant responses and could be a useful tool for sustainable (e.g. lower use of chemicals and labor-practices) management of yield and quality in modern orchards.

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Section: Manipulation Of Light Quality In Orchard Systemsmentioning

confidence: 99%

mentioning

confidence: 99%

Light quality management in fruit orchards: physiological and technological aspects

Bastías

Grappadelli

2012

Chilean J. Agric. Res.

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“…Light spectral composition reaching plants aff ects their growth and development via the participation of plant photoreceptor cells (Folta et al 2005). Cryptochromes and phototropins are specifically blue light-sensitive, whereas phytochromes are more sensitive to red than to blue light (Rajapakse, Shahak 2007).…”

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confidence: 99%

Effect of short-term exposure to red and blue light on dill plants growth

Frąszczak

2013

Hortic. Sci.

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Eff ect of the end-of-day and the end-of-night red and blue light in dill growth was investigated. Ambrozja dill (Anethum graveolens L.) cvs were grown in vegetation chambers in completely controlled conditions exposed to white diode light. Red and blue light was employed for 30 min before the initiation or after the end of the lighting period. Th e values of plant fresh mass, area and height parameters were the highest for plants treated with red light at the end of night. Th e application of red light at the end of day exerted a similar eff ect on plants as the exposure of plants to blue light at the end of night. Plants treated with blue light at the end of the lighting period were characterised by the poorest growth rate. Plants additionally lighted with blue light were found to have both distinctly smaller mass as well as area in comparison with plants exposed to red light. Both methods are useful to control the plants growth depending on the phase of plant development and growers' requirements.

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“…Pearl, White and Grey) absorbing spectral bands shorter, or longer than the visible range. The spectral manipulation is aimed at specifically promoting physiological responses, while light scattering improves light penetration into the inner canopy (Rajapakse and Shahak, 2007).…”

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confidence: 99%

Reduce the Harmful Effect of High Temperature to Improve the Productivity of Tomato under Conditions of Newly Reclaimed Land

2014

NIDOC-ASRT

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HE GROWTH and productivity of tomato (Solanum lycopersicon L. Alissa F1 hybrid) is affected by environmental factors and agronomical techniques. There were seven treatments used to minimize the injury of high temperature during the summer season, i.e: two shade net treatments (black or green), two spray treatments i.e. Purshade or sea algae (Robin Pro), two intercropping treatments (maize or sunflower) in comparison with the control (without any treatment). Tomato was cultivated during two studies season in the 'Amoun Agricultural Society, Eltal El Kabier, Cairo-Ismailia Desert Road, Ismailia Governorate, Egypt during late summer seasons of 2012 and 2013. This study investigated the effect of different techniques of protected cultivation against unfavorable condition of high temperature on the growth and production of tomato in terms of air temperature, relative humidity and light intensity. Plant growth was evaluated over the two seasons. All physical protected cultivation treatments (cover net or intercropping) decreased light intensity, maximum temperatures and increased relative humidity compared with open field conditions without protection treatment. The black cover net was the most effective method to decrease the air temperature by from 2 to 3°C followed by green net (about 2°C), the intercropping was less effective to decrease temperature (1°C). Green and black net produced the highest significant plant height, number of branches, fresh and dry weight per plant. Moreover, green and black net shortest period from transplanting to flowering comparing to the other treatments, i.e. intercropping with maize and sunflower as well as the control treatments. The earliest and the highest tomato total yield were obtained by using the green net cover followed by black net cover while the latest and the lowest total yield was obtained under control treatment (un shaded). Moreover, the higher fruit length, fruit diameter, fruit wall thickness and number of locules associated with the use of the green net in comparison with other protected cultivation treatments as well as the control during the two seasons. There were no significant among the treatments in fruit color and juice acidity during the two seasons.

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Light-Quality Manipulation by Horticulture Industry

Cited by 55 publications

References 62 publications

Light quality management in fruit orchards: physiological and technological aspects

Light quality management in fruit orchards: physiological and technological aspects

Effect of short-term exposure to red and blue light on dill plants growth

Reduce the Harmful Effect of High Temperature to Improve the Productivity of Tomato under Conditions of Newly Reclaimed Land

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