HOLOCENTRIC CHROMOSOME BEHAVIOR IN CUSCUTA (CUSCUTACEAE)

Authors
PAZY B PLITMANN U
Citation
B. Pazy et U. Plitmann, HOLOCENTRIC CHROMOSOME BEHAVIOR IN CUSCUTA (CUSCUTACEAE), Plant systematics and evolution, 191(1-2), 1994, pp. 105-109
Citations number
9
Categorie Soggetti
Plant Sciences
Journal title
Plant systematics and evolution → ACNP
ISSN journal
03782697
Volume
191
Issue
1-2
Year of publication
1994
Pages
105 - 109
Database
ISI
SICI code
0378-2697(1994)191:1-2<105:HCBIC(>2.0.ZU;2-2
Abstract
The present study demonstrates that Cuscuta babylonica CHOISY has holo centric chromosomes. Evidence for this phenomenon comes from three dif ferent observations. (1) Mitosis: During metaphase and anaphase the si ster-chromatids are situated parallel to the equatorial plane with no sign of localized kinetochore activity. (2) Inverted meiosis in micros porocytes. (3) X-rayed microsporocytes, in which the numerous chromoso me fragments do not show any lagging or formation of micronuclei. We a ssume that only one out of the three subgenera in Cuscuta, namely subg . Cuscuta, has holocentric chromosomes, while the two other subgenera have monocentric chromosomes.