Current issue: 54(1)

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Impact factor 1.683
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Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'sirkkataimi'.

Category: Article

article id 7316, category Article
Martti Hertz. (1935). Kuusen juuriston ensi kehityksestä. Acta Forestalia Fennica vol. 41 no. 3 article id 7316. https://doi.org/10.14214/aff.7316
English title: The early development of Norway spruce root system.
English keywords: main root; forest site; seedlings

The development roots of Norway spruce (Picea abies (L.) H. Karst.) seedlings was studied in sample seedlings grown in different kinds of sites. In the early stage, the seedling roots grow primarily length. The main root is usually long. If the growth of the root is hindered, the tip of the root dies, and the root system growing from the original root collar remains relatively small; in these cases, the secondary root system becomes more important. In unfavourable conditions the root branches can early on replace the main root. The main root of a germling seems to be less able to seek for free growing space than the main and side roots of older seedlings. When the growth of the root is blocked by some kind of obstacle, it does not often hinder the growth of the seedling. The type of soil influences strongly how the root system grows. In good soil and in humus the root system is regular and richly branched, while in clay and coarse sand the root system was small. Spahgnum moss was good substrate for seedlings, Dicranum undulatum moss little less good, while the seedlings grew poorly on Pleurozium Schreberi.

The PDF includes a summary in German.

  • Hertz, ORCID ID:E-mail:
article id 4903, category Article
Olavi Luukkanen. (1974). Esikokeita kinetiinin vaikutuksesta männyn hypokotyylien kallus- ja juurimuodostukseen. Silva Fennica vol. 8 no. 2 article id 4903. https://doi.org/10.14214/sf.a14747
English title: Effect of kinetin on the formation of callus and roots in hypocotyls of Scots pine; preliminary experiments.

After 64 days of aseptic culture, germlings of Pinus Syvestris L. were cut at the middle of the hypocotyl and above the root. The upper and lower halves of the hypocotyls were transferred onto agar medium RM-196 of Linsmaier & Skoog (1964) including 2 mg/l IAA and 0.1, 1 or 10 mg/l kinetin, one or both halves being put in each vial. Callus growth and root formation was observed after 55 days.

The lower ends of basally cut seedlings generally formed callus tissue and 20% of them also formed roots from this callus. No roots and less callus growth were observed in the lower hypocotyle halves excised at both ends. In the latter hypocotyles callus growth was promoted by the presence in the same vial of a basally excised germling, including cotyledons and plumule. Increasing amounts of kinetin slightly enhanced callus formation of basally excised germlings but seemed to inhibit callus growth in hypocotyls excised at both ends and placed alone on the growth medium. The total amount of callus was greatest in hypocotyls which included intact cotyledons and plumule.

The PDF includes a summary in English.

  • Luukkanen, ORCID ID:E-mail:

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