Time-course of programmed cell death during leaf senescence in Eucommia ulmoides.
Publication/Presentation Date
2-1-2003
Abstract
Leaves of Eucommia ulmoidesOliv. harvested between April to November were examined for programmed cell death (PCD) during growth and senescence. Leaves developed in April, becoming fully expanded in late May, remaining unchanged until November when they started to dehisce. Falling leaves retained a green color. Our results showed that (1) mesophyll cells gradually reduced their nuclei from September to November, (2) positive TUNEL signals appeared on the nuclei from August, (3) ladder-like DNA fragmentation occurred in September and October, and (4) a 20-kDa Ca(2+)-dependent DNase appeared in these same months. In fallen leaves, intact mesophyll cell nuclei could not be detected, but a few cells around the vascular bundle had nuclei. Therefore, (1) programmed cell death (PCD) of leaf cells occurred in the leaves of E. ulmoides, (2) the progress of mesophyll cell PCD lasted for more than 2 months, and (3) PCD of leaf cells was asynchronous in natural senescing leaves.
Volume
116
Issue
1
First Page
7
Last Page
12
ISSN
0918-9440
Published In/Presented At
Cao, J., Jiang, F., Sodmergen, & Cui, K. (2003). Time-course of programmed cell death during leaf senescence in Eucommia ulmoides. Journal of plant research, 116(1), 7–12. https://doi.org/10.1007/s10265-002-0063-5
Disciplines
Diagnosis | Medicine and Health Sciences | Other Analytical, Diagnostic and Therapeutic Techniques and Equipment | Radiology
PubMedID
12605294
Department(s)
Department of Radiology and Diagnostic Medical Imaging
Document Type
Article