Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

INFLUENCE OF ENVIRONMENTAL FACTORS ON MERISTEM ACTIVITY AND STABILITY IN MATURE-PHASE HEDERA HELIX PLANTS

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Israel Journal of Plant Sciences

Mature-phase Hedera helix L. plants were subjected to different environmental conditions in growth chambers in order to determine the factors ensuring the maintenance of a strictly vegetative growth with foliar leaf production. At a temperature of 24°C and at a light flux of 20,000 lux (300 μ E m−2 s−1) photosynthetically active radiation (PAR), inflorescence initiation was inhibited under both long days (LD) and short days (SD); however, in about 50% of the plants the meristems became quiescent for a short period. During later development, these meristems, as well as those of the remaining 50% of the plants, became unstable resulting in plants with distichous phyllotaxis and other juvenile characteristics. At 21°C and at the same light flux, a high percentage of the plants became quiescent or formed at least some scale-type leaves. When relative humidity (R.H.) was maintained at 100%, the proportion of quiescent plants was lower than at ambient humidity (50–70% R.H.). At 24°C and under SD, the degree of instability and quiescence of the meristems was dependent on light flux. A low light flux promoted meristem instability as reflected by the appearance of distichous phyllotaxis. A high light flux (30,000 lux, 450 μ E m−2 s−1 PAR) promoted the activity and stability of the meristems, as reflected by the continued production of foliar leaves in a spiral phyllotactic pattern. At a low light flux (10,000 lux, 150 μ E m−2 s−1 PAR) and at 27°C. meristems became unstable in 100% of the plants, which resulted in distichous phyllotaxis and other juvenile characteristics. These results demonstrate that environmental conditions can be manipulated so as to maintain mature characteristics or induce juvenile characteristics in H. helix plants. Although the size and shape of the meristems changed during growth and in relation to phase instability, it was not possible to conclude whether the reduction in meristem size preceded or followed the change to distichous phyllotaxis.

Affiliations: 1: Department of Ornamental Horticulture, Agricultural Research Organization ; 2: Department of Horticultural Science and Landscape Architecture

10.1080/0021213X.1989.10677115
/content/journals/10.1080/0021213x.1989.10677115
dcterms_title,pub_keyword,dcterms_description,pub_author
10
5
Loading
Loading

Full text loading...

/content/journals/10.1080/0021213x.1989.10677115
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1080/0021213x.1989.10677115
Loading

Article metrics loading...

/content/journals/10.1080/0021213x.1989.10677115
1989-05-13
2018-06-25

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Israel Journal of Plant Sciences — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation