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Water and photosynthesis relations o...

Qul, Abdul-Wasea A.

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Water and photosynthesis relations of greenhouse roses grown under supplemental lighting.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Water and photosynthesis relations of greenhouse roses grown under supplemental lighting./
Author:	Qul, Abdul-Wasea A.
Description:	127 p.
Notes:	Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6011.
Contained By:	Dissertation Abstracts International54-12B.
Subject:	Biology, Plant Physiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9414805

Water and photosynthesis relations of greenhouse roses grown under supplemental lighting.
Qul, Abdul-Wasea A.

Water and photosynthesis relations of greenhouse roses grown under supplemental lighting. - 127 p.

Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6011.

Thesis (Ph.D.)--Washington State University, 1993.

'Royalty' roses were grown in a greenhouse under different high intensity supplementary irradiation (HISI) regimes. The leaf water potential (YSubjects--Topical Terms:

1017865
Biology, Plant Physiology.

Water and photosynthesis relations of greenhouse roses grown under supplemental lighting.
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100 1 $a Qul, Abdul-Wasea A. $3 1943485
245 1 0 $a Water and photosynthesis relations of greenhouse roses grown under supplemental lighting.
300 $a 127 p.
500 $a Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6011.
500 $a Chair: Kurt A. Schekel.
502 $a Thesis (Ph.D.)--Washington State University, 1993.
520 $a 'Royalty' roses were grown in a greenhouse under different high intensity supplementary irradiation (HISI) regimes. The leaf water potential (Y $\ sb{\rm w}) $ negatively correlated with quantum flux density (Q) as well as with transpiration rate (E) and stomatal conductance (g $\ sb{\rm s}). $ There was no midday reduction in E, g $\ sb{\rm s} $ or net photosynthetic rate (Pn). A reduction in Y $\ sb{\rm w} $ was observed at midday, except under low light conditions of 44-52 $\ mu $m ol m $\ sp{-2} $ s $\ sp{-1}.
520 $a Pn increased linearly with E and g $\ sb{\rm s} $ as a result of increased Q regardless of time of year, day and/or light regimes. The relationship between Pn and Q was quadratic, but almost linear up to a Q of 450-500 $\ mu $m ol m $\ sp{-2} $ s $\ sp{-1}. $ No midday reductions in Pn were observed.
520 $a A lower light compensation point of 18 $\ mu $m ol m $\ sp{-2} $ s $\ sp{-1} $ was observed on roses grown for extended periods under lower light intensities than roses grown under higher light during the year. A lag period of about 2-4 hrs was observed for Pn to reach a maximum and stable level after HISI came on at night.
520 $a Increases in Pn resulted in increased leaf total soluble carbohydrates (TSC) which was correlated highly with Q. The longer the photoperiod, the higher the TSC. Sucrose and sorbitol were most abundant and comprised 22-43% or 31-32% respectively of TSC depending on time of day, year and light regime.
520 $a Cut roses placed in full (FSF) or half (HSF) recommended strength Floralife solution showed leaf brittleness with negative Pn and unpleasant odor, but limited "bent neck" stems. While no brittle leaves or unpleasant odor occurred on roses placed in DW, several "bent neck" stems and higher Pn were observed on roses placed in DW.
590 $a School code: 0251.
650 4 $a Biology, Plant Physiology. $3 1017865
650 4 $a Agriculture, Plant Culture. $3 1018669
690 $a 0817
690 $a 0479
710 2 0 $a Washington State University. $3 678588
773 0 $t Dissertation Abstracts International $g 54-12B.
790 1 0 $a Schekel, Kurt A., $e advisor
790 $a 0251
791 $a Ph.D.
792 $a 1993
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9414805