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Effects of Different Light Emitting ...

Salehinia, Shafieh.

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Effects of Different Light Emitting Diode Spectra and Intensities on the Stomatal Functioning of Lettuce and Basil.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effects of Different Light Emitting Diode Spectra and Intensities on the Stomatal Functioning of Lettuce and Basil./
Author:	Salehinia, Shafieh.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	85 p.
Notes:	Source: Masters Abstracts International, Volume: 85-11.
Contained By:	Masters Abstracts International85-11.
Subject:	Light emitting diodes. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31086607
ISBN:	9798382618821

Effects of Different Light Emitting Diode Spectra and Intensities on the Stomatal Functioning of Lettuce and Basil.
Salehinia, Shafieh.

Effects of Different Light Emitting Diode Spectra and Intensities on the Stomatal Functioning of Lettuce and Basil. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 85 p.

Source: Masters Abstracts International, Volume: 85-11.

Thesis (M.S.)--McGill University (Canada), 2023.

Light attributes, including intensity and quality, play crucial roles in regulating gas exchange between a leaf and its surrounding environment by influencing stomatal behavior. Understanding how stomata respond to different lighting conditions remains an intriguing research area. With the advancements in light-emitting diodes (LEDs), it is now possible to study plant responses to specific regions of the light spectrum. Stomatal regulation is essential for maintaining a balance between the plant's need for photosynthesis and the prevention of excessive water vapor loss. While the stomatal responses to red and blue lights have been extensively studied, the effects of green light on stomatal behavior remain largely unexplored. Controlling stomatal function in leafy vegetables during postharvest storage is crucial to prevent excessive water loss and wilting which affects marketability. This research aimed to investigate the stomatal opening response of lettuce (Lactuca sativa) and basil (Ocimum basilicum) to varying light quality (430 nm, 630 nm, 500 nm, 530 nm, 560 nm) and quantity (50 µmol m -2 s -1, 75 µmol m -2 s -1, 100 µmol m -2 s -1, 400 µmol m -2 s -1Photosynthetic Photon Flux Density (PPFD)), and to identify wavelengths that induce stomatal closure. Our data reveal that stomatal opening in response to different wavelengths is dependent on light intensity. Under most blue and red light treatments, stomatal opening increased on both the abaxial and adaxial leaf surfaces. However, under green light (530 nm and 560 nm), particularly at lower PPFDs, stomatal opening was reduced. These findings emphasize the efficacy of green light (530 nm and 560 nm) in maintaining stomatal closure compared to other light spectra. Utilizing green light during postharvest storage can effectively help preserve the quality and extend the shelf life of leafy greens. In conclusion, this study sheds light on the influence of light quality and quantity on stomatal behavior in lettuce and basil. It highlights the significance of low intensity green light in regulating stomatal closure and provides valuable insights for maintaining postharvest quality and prolonging the shelf life of leafy vegetables.

ISBN: 9798382618821Subjects--Topical Terms:

578763
Light emitting diodes.

Effects of Different Light Emitting Diode Spectra and Intensities on the Stomatal Functioning of Lettuce and Basil.
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245 1 0 $a Effects of Different Light Emitting Diode Spectra and Intensities on the Stomatal Functioning of Lettuce and Basil.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 85 p.
500 $a Source: Masters Abstracts International, Volume: 85-11.
500 $a Advisor: Lefsrud, Mark.
502 $a Thesis (M.S.)--McGill University (Canada), 2023.
520 $a Light attributes, including intensity and quality, play crucial roles in regulating gas exchange between a leaf and its surrounding environment by influencing stomatal behavior. Understanding how stomata respond to different lighting conditions remains an intriguing research area. With the advancements in light-emitting diodes (LEDs), it is now possible to study plant responses to specific regions of the light spectrum. Stomatal regulation is essential for maintaining a balance between the plant's need for photosynthesis and the prevention of excessive water vapor loss. While the stomatal responses to red and blue lights have been extensively studied, the effects of green light on stomatal behavior remain largely unexplored. Controlling stomatal function in leafy vegetables during postharvest storage is crucial to prevent excessive water loss and wilting which affects marketability. This research aimed to investigate the stomatal opening response of lettuce (Lactuca sativa) and basil (Ocimum basilicum) to varying light quality (430 nm, 630 nm, 500 nm, 530 nm, 560 nm) and quantity (50 µmol m -2 s -1, 75 µmol m -2 s -1, 100 µmol m -2 s -1, 400 µmol m -2 s -1Photosynthetic Photon Flux Density (PPFD)), and to identify wavelengths that induce stomatal closure. Our data reveal that stomatal opening in response to different wavelengths is dependent on light intensity. Under most blue and red light treatments, stomatal opening increased on both the abaxial and adaxial leaf surfaces. However, under green light (530 nm and 560 nm), particularly at lower PPFDs, stomatal opening was reduced. These findings emphasize the efficacy of green light (530 nm and 560 nm) in maintaining stomatal closure compared to other light spectra. Utilizing green light during postharvest storage can effectively help preserve the quality and extend the shelf life of leafy greens. In conclusion, this study sheds light on the influence of light quality and quantity on stomatal behavior in lettuce and basil. It highlights the significance of low intensity green light in regulating stomatal closure and provides valuable insights for maintaining postharvest quality and prolonging the shelf life of leafy vegetables.
520 $a Les attributs de la lumiere, y compris l'intensite et la qualite, jouent un role crucial dans la regulation des echanges gazeux entre une feuille et son environnement environnant en influencant le comportement stomatique. Comprendre comment les stomates reagissent a differentes conditions d'eclairage reste un domaine de recherche intrigant. Avec les progres des diodes electroluminescentes (DEL), il est desormais possible d'etudier les reponses des plantes a des regions specifiques du spectre lumineux. La regulation stomatique est essentielle pour maintenir un equilibre entre le besoin de photosynthese de la plante et la prevention d'une perte excessive en eau. Alors que les reponses stomatiques aux lumieres rouges et bleues ont ete largement etudiees, les effets de la lumiere verte sur le comportement stomatique restent largement inexplores. Le controle de la fonction stomatique des legumes-feuilles pendant l'entreposage post-recolte est crucial pour eviter la perte excessive d'eau et le fletrissement qui affectent la commercialisation. Cette recherche visait a etudier la reponse a l'ouverture stomatique de la laitue (Lactuca sativa) et du basilic (Ocimum basilicum) a differentes qualites de lumiere (430 nm, 630 nm, 500 nm, 530 nm, 560 nm) et quantite (50 µmol m -2 s -1, 75 µmol m -2 s -1, 100 µmol m -2 s -1, 400 µmol m -2 s -1de densite de flux de photons photosynthetiques (PPFD)), et pour identifier les longueurs d'onde qui induisent la fermeture des stomates. Nos donnees revelent que l'ouverture des stomates en reponse a differentes longueurs d'onde depend de l'intensite lumineuse. Dans la plupart des traitements a la lumiere bleue et rouge, l'ouverture des stomates a augmente a la fois sur les surfaces abaxiale et adaxiale des feuilles. Cependant, sous lumiere verte (530 nm et 560 nm), en particulier a des PPFD inferieurs, l'ouverture stomatique etait reduite. Ces resultats soulignent l'efficacite de la lumiere verte (530 nm et 560 nm) dans le maintien de la fermeture stomatique par rapport aux autres spectres lumineux. L'utilisation de la lumiere verte pendant l'entreposage post-recolte peut aider efficacement a preserver la qualite et a prolonger la duree de conservation des legumes-feuilles. En conclusion, cette etude met en lumiere l'influence de la qualite et de la quantite de la lumiere sur le comportement stomatique de la laitue et du basilic. Il met en evidence l'importance de la lumiere verte de faible intensite dans la regulation de la fermeture des stomates et fournit des informations precieuses pour maintenir la qualite post-recolte et prolonger la duree de conservation des legumes a feuilles.
590 $a School code: 0781.
650 4 $a Light emitting diodes. $3 578763
650 4 $a Agriculture. $3 518588
650 4 $a Carbon dioxide. $3 587886
650 4 $a Electrical engineering. $3 649834
650 4 $a Food science. $3 3173303
650 4 $a Optics. $3 517925
690 $a 0473
690 $a 0544
690 $a 0359
690 $a 0752
710 2 $a McGill University (Canada). $3 1018122
773 0 $t Masters Abstracts International $g 85-11.
790 $a 0781
791 $a M.S.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31086607