caa a22 4500 477101682 CHVBK 20180405111543.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF00195730 doi (NATIONALLICENCE)springer-10.1007/BF00195730 Ueno Osamu Laboratory of Developmental Physiology, Department of Applied Physiology, National Institute of Agrobiological Resources, Tsukuba, 305, Ibaraki, Japan aut Structural characterization of photosynthetic cells in an amphibious sedge, Eleocharis vivipara , in relation to C3 and C4 metabolism [Elektronische Daten] [Osamu Ueno] Eleocharis vivipara Link is a unique amphibious leafless sedge. The terrestrial form has Kranz anatomy and the biochemical traits of C4 plants while the submerged form develops structural and biochemical traits similar to those of C3 plants. The structural features of the culms, which are the photosynthetic organs, of the two forms were examined and compared. The culms of the terrestrial form have mesophyll cells and three bundle sheaths which consist of three kinds of cell, namely, the innermost Kranz cells that contain large numbers of organelles, the middle mestome sheath cells that lack chloroplasts, and the outermost parenchyma sheath cells that contain chloroplasts. The culms of the submerged form had a tendency towards reduction in numbers and size of Kranz cells and vascular bundles, as compared to the terrestrial form, and they had spherical mesophyll cells that were tightly packed without intercellular spaces inside the epidermis. The submerged form had a higher ratio of cross-sectional area of mesophyll cells plus parenchyma sheath cells to that of Kranz cells than the terrestrial form. The difference was mainly due to a decrease in the number and the size of the Kranz cells and to a marked increase in the size of the mesophyll cells and the parenchyma sheath cells in the submerged form, as compared to the terrestrial form. The Kranz cells of the terrestrial form had basically the structural characteristics of plants of the NAD-malic enzyme type, with the exception of the intracellular location of organelles. The Kranz cells of the submerged form included only a few organelles, and the percentage of organelles partitioned to the Kranz cells was significantly smaller in the submerged form than in the terrestrial form. In addition, the size of chloroplasts of the Kranz cells was 60-70% of that of the terrestrial form. These structural differences between the two forms may be related to the functional differences in their mechanisms of photosynthesis. Springer-Verlag, 1996 Amphibious plant nationallicence C3 and C4 photosynthesis nationallicence Eleocharis (C3, C4 metabolism) nationallicence Kranz-type anatomy nationallicence KC : Kranz cell nationallicence MC : mesophyll cell nationallicence PSC : parenchyma sheath cell nationallicence NAD-ME : NAD-malic enzyme nationallicence VB : vascular bundle nationallicence Planta Springer-Verlag 199/3(1996-07-01), 382-393 0032-0935 199:3<382 1996 199 425 https://doi.org/10.1007/BF00195730 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00195730 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ueno Osamu Laboratory of Developmental Physiology, Department of Applied Physiology, National Institute of Agrobiological Resources, Tsukuba, 305, Ibaraki, Japan aut NATIONALLICENCE 773 0- Planta Springer-Verlag 199/3(1996-07-01), 382-393 0032-0935 199:3<382 1996 199 425 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer