JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Obituary: Dr. R. C. Dalela
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
    About Triveni Enterprises
Read Journal
    Current Issue
    Journal Archives
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status

Google Search the Journal web-site:

    Abstract - Issue Jul 2022, 43 (4)                                     Back

nstantaneous and historical temperature effects on a-pinene

Cytomorphological and biochemical implications of UV-B priming in fennel (Foeniculum vulgare Mill.)


M. Mishra*, G. Kumar and K. Tripathi

Plant Genetics Laboratory, Department of Botany, University of Allahabad, Prayagraj-211 002, India

*Corresponding Author Email :


Received: 06.04.2021                                                                                                          Revised: 10.08.2021                                                                  Accepted: 01.01.2022




Aim: The aim of this study was to create variability on the morphogenetic make- up, and biochemical attributes of fennel plant which incurred as a result of different exposure of UV-B radiation.

Methodology: Seedlings of Foeniculum vulgare Mill. were treated with four different exposure times viz.  Set A for Control, Set B for 20 min, Set C for 40 min, Set D for 60 min and Set E for 80 min, respectively. UV-B exposure seedlings with respect to control were transplanted to their respective pots and fields. Three replicates were prepared for each treatment. During the course of growth and development, few morphological, biochemical, and cytological parameters were estimated.

Results: The results clearly elucidate that the higher exposure to UV-B radiation substantially affected the growth parameters whereas UV-B radiation (40 min) induced certain beneficial traits viz., increased plant height, intermodal length, etc. Various types of chromosomal aberrations such as stickiness, scattering, precocious, laggard, etc., were also observed. Scattering was the main chromosomal abnormality encountered at longer durations (60-80 min) to UV-B exposure.  It was also observed that withincrease in the duration of UV-B exposure (20-80 min), there was a decrease in chlorophyll a (0.98 to 0.82) and chlorophyll b (0.68), and increase in carotenoids (at lower duration of UV-B radiation) was also observed. A maximum increment in carotenoid content was recorded in 40 min treated sets.

Interpretation: The present research would be helpful in selecting doses which impart characters of interest in Foeniculum vulgare Mill. The cytological alterations caused by UV-B radiation changes the genetic makeup of fennel, which can be inherited to the subsequent generation to create agronomical superior mutants which will be promising materials for plant breeders in near future.

Key words: Chlorophyll variants, Chromosomal abnormality, Foeniculum vulgare, UV-B radiation




Copyright © 2022 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).