TY - JOUR
T1 - Seed dormancy in the early diverging eudicot Trochodendron aralioides (Trochodendraceae)
AU - Baskin, Jerry M.
AU - Baskin, Carol C.
AU - Chien, Ching Te
AU - Chen, Shun Ying
PY - 2006/3
Y1 - 2006/3
N2 - The embryo length/seed length (E/S) ratio of the early diverging eudicot Trochodendron aralioides is 0.34. Embryos in fresh seeds were 0.36 ± 0.01 mm long, and they increased in length by about 250% (in 20 d) before radicle emergence (germination) occurred, demonstrating that the embryo is underdeveloped at seed maturity. Seeds germinated to 95-100% at 20/10, 25/15 and 30/15°C in light in ≤ 4 weeks, without any pretreatment, but no seeds germinated in darkness. Thus, seeds of T. aralioides have morphological dormancy (MD), which is considered to be the primitive condition in seed plants, and MD probably has existed in the genus Trochodendron since its origin in the early Tertiary.
AB - The embryo length/seed length (E/S) ratio of the early diverging eudicot Trochodendron aralioides is 0.34. Embryos in fresh seeds were 0.36 ± 0.01 mm long, and they increased in length by about 250% (in 20 d) before radicle emergence (germination) occurred, demonstrating that the embryo is underdeveloped at seed maturity. Seeds germinated to 95-100% at 20/10, 25/15 and 30/15°C in light in ≤ 4 weeks, without any pretreatment, but no seeds germinated in darkness. Thus, seeds of T. aralioides have morphological dormancy (MD), which is considered to be the primitive condition in seed plants, and MD probably has existed in the genus Trochodendron since its origin in the early Tertiary.
KW - Basal eudicot
KW - Fossil record of Trochodendron
KW - Morphological dormancy
KW - Primitive dormancy class
KW - Underdeveloped embryo
UR - http://www.scopus.com/inward/record.url?scp=33644754761&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33644754761&partnerID=8YFLogxK
U2 - 10.1079/SSR2005235
DO - 10.1079/SSR2005235
M3 - Article
AN - SCOPUS:33644754761
SN - 0960-2585
VL - 16
SP - 71
EP - 75
JO - Seed Science Research
JF - Seed Science Research
IS - 1
ER -