NDLI: Observation and investigation of three endosperm transport tissues in sorghum caryopses

Content Provider	Springer Nature Link
Author	Zheng, Yankun Xiong, Fei Wang, Zhong Gu, Yunjie
Copyright Year	2014
Abstract	Endosperm transport tissues in sorghum caryopses include endosperm transfer cells, endosperm conducting cells, and the embryo surrounding region. To elucidate the structural changes of these tissues and their relationship with the caryopsis development, sorghum caryopses were analyzed at different days after pollination using light, fluorescence, and electron microscopy. The following results were obtained: post-phloem maternal tissues included the placentochalaza and the nucellar projection-like nucellus. Well-developed endosperm transfer cells exhibited very evident flange-type wall ingrowths. Very few wall ingrowths were present in the initially developed endosperm transfer cells when the level of sucrose from the initially developed vascular system was low. At the middle stage of caryopsis development, the level of sucrose from the well-developed vascular system was high. Endosperm transfer cells increased in both area and layer amount, and their wall ingrowths increased in both length and density. Later in caryopsis development, the level of sucrose from the degenerated vascular system was low and wall ingrowths distorted in the degenerated endosperm transfer cells. Endosperm conducting cells primarily occupied the most part of endosperm, but decreased gradually because the upper part transformed into the starchy endosperm and the lower part degenerated to give space to the embryo growth. Although the embryo surrounding region initially enveloped the small embryo, it rapidly degenerated and finally disappeared. Our data showed that (1) the caryopsis vascular system influenced the differentiation of endosperm transfer cells by controlling the sugar levels (2) and configuration of endosperm transport tissues were probably altered to favor the growth of filial tissues.
Starting Page	705
Ending Page	714
Page Count	10
File Format	PDF
ISSN	0033183X
Journal	Protoplasma
Volume Number	252
Issue Number	2
e-ISSN	16156102
Language	English
Publisher	Springer Vienna
Publisher Date	2014-09-24
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sorghum Caryopsis Endosperm Endosperm transport tissues Cell Biology Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science Medicine

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