英语词汇“protostele”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

protostele n.

Brit.

/ˈprəʊtə(ʊ)stiːl/

/ˈprəʊtə(ʊ)ˌstiːli/

U.S.

/ˈproʊdəˌstil/

/ˈproʊdəˌstili/

Botany a type of stele typical of primitive plants (still found in, e.g., the seedling stages of many ferns) that lacks pith and consists of a solid core of xylem surrounded by a cylinder of phloem.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > stele

meristele1894

stele1895

protostele1901

eustele1902

monostele1902

siphonostele1902

polystele1904

1901 L. A. Boodle in Ann. Bot. 15 705 A centrally placed solid stele (protostele), consisting of a central mass of xylem..surrounded by a continuous ring of phloem.

1960 K. Esau Anat. Seed Plants xvi. 216 In the simplest type of stele—which is also considered to be the most primitive phylogenetically—the vascular tissue forms a solid column. This is the protostele.

1998 Amer. Jrnl. Bot. 85 888/2 The osmundaceous stem evolved from a basic protostele through a series of stages to the ectophloic siphonostele characteristic of extant taxa.

单词	protostele
释义	> as lemmas protostele protostele n. Brit. /ˈprəʊtə(ʊ)stiːl/ , /ˈprəʊtə(ʊ)ˌstiːli/ , U.S. /ˈproʊdəˌstil/ , /ˈproʊdəˌstili/ Botany a type of stele typical of primitive plants (still found in, e.g., the seedling stages of many ferns) that lacks pith and consists of a solid core of xylem surrounded by a cylinder of phloem. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > stele meristele1894 stele1895 protostele1901 eustele1902 monostele1902 siphonostele1902 polystele1904 1901 L. A. Boodle in Ann. Bot. 15 705 A centrally placed solid stele (protostele), consisting of a central mass of xylem..surrounded by a continuous ring of phloem. 1960 K. Esau Anat. Seed Plants xvi. 216 In the simplest type of stele—which is also considered to be the most primitive phylogenetically—the vascular tissue forms a solid column. This is the protostele. 1998 Amer. Jrnl. Bot. 85 888/2 The osmundaceous stem evolved from a basic protostele through a series of stages to the ectophloic siphonostele characteristic of extant taxa. extracted from proto-comb. form < as lemmas
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> as lemmas