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Paclobutrazol enhances photosynthesis and ajmalicine production in Catharanthus roseus

Paper ID Volume ID Publish Year Pages File Format Full-Text
35723 45103 2007 5 PDF Available
Title
Paclobutrazol enhances photosynthesis and ajmalicine production in Catharanthus roseus
Abstract

An investigation was carried out with paclobutrazol (PBZ) in order to study its effect on the photosynthetic and anatomical characteristics of Catharanthus roseus (L.) G. Don. The chlorophyll content and related parameters like net photosynthetic rate, transpiration rate and internal CO2 concentration were measured from control and treated plant samples. The anatomical characteristics, viz., leaf thickness, epidermis and cuticle, palisade layer, spongy layer and vascular bundle were studied. The root alkaloid ajmalicine was extracted and estimated from both treated and control plant roots. Photosynthetic pigment increased under PBZ treatment. PBZ treatment increased the net photosynthetic rate and internal CO2 concentration, but reduced transpiration. PBZ treatment increased the thickness of the leaf, epidermis and cuticle, palisade layer and spongy layer but reduced the diameter of xylem vessels significantly when compared to control, however the phloem elements had shown an increased diameter as compared to control in the PBZ treated plants. There was a significant enhancement in ajmalicine content under PBZ treatment when compared to control plants. The results suggested that the application of PBZ have significant effects on photosynthetic and anatomical responses thus can be used for improving productivity in medicinal plants.

Keywords
PBZ, paclobutrazol; RH, relative humidity; DAP, days after planting; ABA, abscisic acid; DMRT, Duncan's multiple range testCatharanthus roseus; Chlorophyll; Ajmalicine; Plant growth regulator; Paclobutrazol; Anatomy
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Paclobutrazol enhances photosynthesis and ajmalicine production in Catharanthus roseus
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 11, November 2007, Pages 1566–1570
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us