C
cranberry
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założę się że teraz wszyscy zaciekawieni tym tematem będą próbować lampy UV 


SMIESZNY1 napisał:Nie ma co testować.
Qbek napisał:czy to znowu te *****e krasnoludki podrzuciły.
Pytanie: Czy UVB jest powszechnie stosowanym suplementem przy uprawach np: komercyjnych. Czy jest to -> moda która się pojawiła jakiś czas temu - i .. efekty które to przynosi są.. hmmm właśnie ..
jakie sa to efekty ? // Orion - miał zamieścić fotorelacje z tego co pamiętam : była obiecana- testy: porównawcze: na klonach: //
jak zapodam uvb nad polowa moich roslin, a nad druga polowa nie, to tez bede mial miarodajny wynik![]()
Kot Bonifacy napisał:moge to zrobic wkrotce![]()
szkoda ze orion zamilkl w kwestii tych klonow...
Effects of ABA on primary terpenoids and Δ9-tetrahydrocannabinol in Cannabis sativa L. at flowering stage
Hakimeh Mansouri1, 2 , Zahra Asrar1 and Jan Szopa3
(1) Department of Biology, Bahonar University, Kerman, Iran
(2) International Center for Science, High Technology, and Environmental Science (ICST), Kerman, Iran
(3) Department of Biotechnology, Wroclaw University, Wroclaw, Poland
Received: 30 September 2008 Accepted: 26 March 2009 Published online: 12 April 2009
Abstract
This work examined the effects of exogenously applied abscisic acid (ABA) on the content of chlorophyll, carotenoids, α-tocopherol, squalene, phytosterols, Δ9-tetrahydrocannabinol (THC) concentration, 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGR) and 1-deoxy-d-xylulose 5-phosphate synthase (DXS) activity in Cannabis sativa L. at flowering stage. Treatment with 1 and 10 mg l−1 ABA significantly decreased the contents of chlorophyll, carotenoids, squalene, stigmasterol, sitosterol, and HMGR activity in female cannabis plants. ABA caused an increase in α-tocopherol content and DXS activity in leaves and THC concentration in leaves and flowers of female plants. Chlorophyll content decreased with 10 mg l−1 ABA in male plants. Treatment with 1 and 10 mg l−1 ABA showed a decrease in HMGR activity, squalene, stigmasterol, and sitosterol contents in leaves but an increase in THC content of leaves and flowers in male plants. The results suggest that ABA can induce biosynthesis of 2-methyl-d-erythritol-4-phosphate (MEP) pathway secondary metabolites accumulation (α-tocopherol and THC) and down regulated biosynthesis of terpenoid primary metabolites from MEP and mevalonate (MVA) pathways (chlorophyll, carotenoids, and phytosterols) in Cannabis sativa.
Keywords Abscisic acid - Terpenoid - α-Tocopherol - Phytosterol - Δ9-Tetrahydrocannabinol
Rozumiem, że matka na klony już czeka: klony sa ciete: i sie korzenia.
oczywiscie, ze tak
korzystajac jeszcze z moich umiejetenosci podrozowania w czasie, juz jutro rano wrzuce wyniki eksperymentu i pelna fotorelacje![]()
Kot Bonifacy napisał:mysle, ze gdybym potencjalnie mial jeden grow pod dwoma takimi samymi lampami i pod jedna uzyl uvb, a pod druga nie, to jesli uvb dziala i efekty sa rzeczywiscie widoczne, bede o tym wiedzial, prawda?![]()
Czy ja dobrze rozumiem:UV-B RADIATION EFFECTS ON PHOTOSYNTHESIS, GROWTH and CANNABINOID PRODUCTION OF TWO Cannabis sativa CHEMOTYPES
John Lydon* 2 Alan H. Teramura 1 C. Benjamin Coffman 3
1 Department of Botany, University of Maryland, College Park, MD 20742, USA 2 USDA-ARS, Southern Weed Science Laboratory, P.O. Box 350, Stoneville, MS 38776, USA 3 USDA-ARS, Weed Science Laboratory, AEQ. I, Beltsville, MD 20705, USA
*To whom correspondence should be adressed.
Copyright 1987 American Society for Photobiology
ABSTRACT
The effects of UV-B radiation on photosynthesis, growth and cannabinoid production of two greenhouse-grown C. sativa chemotypes (drug and fiber) were assessed. Terminal meristems of vegetative and reproductive tissues were irradiated for 40 days at a daily dose of 0, 6.7 or 13.4 kJ m-2 biologically effective UV-B radiation. Infrared gas analysis was used to measure the physiological response of mature leaves, whereas gas-liquid chromatography was used to determine the concentration of cannabinoids in leaf and floral tissue.
There were no significant physiological or morphological differences among UV-B treatments in either drug- or fiber-type plants. The concentration of 9-tetrahydrocannabinol (9-THC), but not of other cannabinoids, in both leaf and floral tissues increased with UV-B dose in drug-type plants. None of the cannabinoids in fiber-type plants were affected by UV-B radiation.
The increased levels of 9-THC in leaves after irradiation may account for the physiological and morphological tolerance to UV-B radiation in the drug-type plants. However, fiber plants showed no comparable change in the level of cannabidiol (a cannabinoid with UV-B absorptive characteristics similar to 9 THC). Thus the contribution of cannabinoids as selective UV-B filters in C. sativa is equivocal.
(Received 29 August 1986; accepted 24 February 1987)
ps: Apropo pierwszego: --> Dzikie konopie niezależnie od rejonu pochodzenia nie miewaja wiecejniż te max 3 do 4 % sumy THC_CBD - czy to sa indie czy to jest Polska.Possible role of ultraviolet radiation in evolution of Cannabis chemotypes
Cytat:
David W. Pate1, 2
(1) Dept. of Pharmacognosy, University of Mississippi, University, 38677, MS
(2) Present address: Department of Biology, University of Missouri-St. Louis, USA
Received: 20 March 1981 Accepted: 20 January 1983
Abstract The damaging effects of UV-B radiation have apparently affected the amounts of ultraviolet-absorbing secondary compounds in some plants. A similar role for Δ9 tetrahydrocannabinol may explain the high levels of this compound inCannabis from areas of intense ambient UV-B. Further research is needed to determine whether UV-B radiation serves only as a selection pressure or if UV-B-induced stress may also directly stimulate production.
Photochemical decomposition of cannabidiol in its resin base
Cytat:
John Lydon1 and Alan H. Teramura
Department of Botany University of Maryland, College Park, MD 20742, U.S.A.
Received 1 August 1986.
Available online 7 March 2001.
Abstract
Cannabidiol in fiber-type Cannabis sativa resin from floral tissues showed a gradual and consistent decline over time when irradiated with 1320 kJ/m2/day of UV and visible radiation. The concentration of 9-tetrahydrocannabinol in the resin was not affected by the treatment. Therefore, the trace amounts of 9-tetrahydrocannabinol detected in some fiber-type C. sativa are probably not of photochemical origin.
Author Keywords: Cannabis sativa; Cannabaceae; hemp; irradiation; decomposition; terpenophenolics; cannabidiol; 9-tetrahydrocannabinol.
Prawdopodobnie. Choć byli i tacy co robili doświadczenia ... Ale nie opracowywali ich statystycznie : albo mieli z góry przyjęty Aksjomat: jak ma to wyjść... no i ... Jeden zwał się np: Łysenko..
Kot Bonifacy napisał:to nie starczyloby czasu na sprawdzenie czegokolwiek, a i tak zawsze mozna by wysnuc jakies "ale"![]()



