caa a22 4500 467901538 CHVBK 20180406152819.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/s00299-006-0194-6 doi (NATIONALLICENCE)springer-10.1007/s00299-006-0194-6 The positional distribution of cell death of ray parenchyma in a conifer, Abies sachalinensis [Elektronische Daten] [Satoshi Nakaba, Yuzou Sano, Takafumi Kubo, Ryo Funada] We monitored the distribution of death of secondary xylem cells in a conifer, Abies sachalinensis. The cell death of tracheids, which are tracheary elements, occurred successively and was related to the distance from cambium. Thus, it resembled programmed cell death. By contrast, the death of long-lived ray parenchyma cells had the following features: (1) ray parenchyma cells remained alive for several years or more; (2) in many cases, no successive cell death occurred even within a given radial cell line of a ray; and (3) the timing of cell death differed among upper and lower radial cell lines and other lines of cells within a ray. These results indicate that the death of long-lived ray parenchyma cells involves a different process from the death of tracheids. The initiation of secondary wall formation and the lignification of ray parenchyma cells in the current year's annual ring were delayed in the upper and lower radial cell lines of a ray. In addition, the density of distribution and orientation of cortical microtubules in such cells were different from those in cells in other radial lines. Ray parenchyma cells in the previous year's annual ring within the upper and lower radial cell lines of a ray contained many starch grains. Our results indicate that positional information is an important factor in the control of the pattern of differentiation and, thus, of the functions of ray parenchyma cells that are derived from the same cambial ray cells. Springer-Verlag, 2006 Abies sachalinensis nationallicence Cell death nationallicence Ray parenchyma cell nationallicence Tracheid nationallicence Xylem differentiation nationallicence Nakaba Satoshi Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509, Tokyo, Japan aut Sano Yuzou Graduate School of Agriculture, Hokkaido University, 060-8589, Sapporo, Japan aut Kubo Takafumi Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509, Tokyo, Japan aut Funada Ryo Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509, Tokyo, Japan aut Plant Cell Reports Springer-Verlag 25/11(2006-11-01), 1143-1148 0721-7714 25:11<1143 2006 25 299 https://doi.org/10.1007/s00299-006-0194-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00299-006-0194-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nakaba Satoshi Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509, Tokyo, Japan aut NATIONALLICENCE 700 1- Sano Yuzou Graduate School of Agriculture, Hokkaido University, 060-8589, Sapporo, Japan aut NATIONALLICENCE 700 1- Kubo Takafumi Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509, Tokyo, Japan aut NATIONALLICENCE 700 1- Funada Ryo Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509, Tokyo, Japan aut NATIONALLICENCE 773 0- Plant Cell Reports Springer-Verlag 25/11(2006-11-01), 1143-1148 0721-7714 25:11<1143 2006 25 299 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer