English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The several clones of Lilium tigrinum in general cultivation are known to have a somatic number of 36 chromosomes (Takenaka and Nagamatsu, 1930; Mather, 1935). The diploid number characteristic of other species of Lilium is 24 (See especially Strasburger, 1882; Guignard, 1884; Coulter, Chamberlain, and Schaffner, 1897; Allen, 1904; Satb, 1932; and Mather, 1935) and recently certain plants to be classed as Lilium tigrinum have come from Japan into culture in America which have a somatic number of 24 chromosomes (Stout, 1933). Sato (1932) mentions "wild" plants of L. tigrinum which produce seed but does not report that these or the seedlings grown are diploid. The several clones of Lilium tigrinum in culture which have a somatic number of 36 chromosomes are presumably auto triploid and closely related in respect to origin. Plants of the diploid type are smaller in stature than are the triploids; the flowers are smaller, their segments are narrower, and the spots on the petals and sepals are, as a rule, smaller. The pollen produced is highly viable and the various plants reared from seed are highly productive of seed when there is compatibility either in selfing or in cross-relations. The triploid clones produce few pollen grains that are viable and in addition there is complete incompatibility for all intra-clonal and inter-clonal pollinations. There are then two distinct types of sterility in the members of the species Lilium tigrinum: (1) there are physiological incompatibilities in fertilization and (2) there are the abortions of spores which are frequent in the triploid clones. The studies here reported are especially concerned with the various critical stages in the microsporogenesis of triploids with reference to the abortions which develop. Some comparisons are made with the various corresponding stages of microsporogenesis in diploid plants.

Microsporogenesis in Diploid and Triploid Types of <i>Lilium tigrinum</i> with Special References to Abortions