濒危物种灰叶胡杨的大孢子发生及雌配子体发育.pdf

, 20 11, 31( 7) : 1303- 1309 A cta Bot . Borea l.-Occident . Sin. ¹ : 1000-4025( 20 11) 07- 1303-07 1, 2, 3 2 1, 2 3* 李志军 , 焦培培 , 王玉丽 , 李健强 ( 1 , 843300; 2 , 843300; 3 , 100193) : . , , , , 18~ 21 ; , ; , , ; 1, 2 ; ; , , ; . , . : ; ; : Q944. 58 : A Megasporogenesis and Development of Female Gametophyte of Endangered Species Pop ul us p ruinosa 1, 2, 3 2 1, 2 3* LI Zh-i jun , JIAO P -i p i , WANG Yu-li , LI Jian-qiang ( 1 C oll g of Plant Sci n c , T arim Univ rsity, Ala r, Xinjinag 843300, China; 2 Xinjiang Pr odu ction C on struction Corps K y Lab oratory of Prot ction and Utilization of Biological R sourc s in Tarim Basin, Ala r, Xinjinag 843300, China; 3 Coll g of Agri- cultur and Bio-t chnology, Ch ina Agricultural U niv rsity, B ijing 100193, China) Abstract:T h m gasporog n sis and d v lopm nt of f mal gam tophyt of ndang r d sp ci s Pop ulus p ruinosa Schr nk. w r studi d using m thod of par affin s ction. T h r sults indicat d that th pistil of P. p ruinosa w as compos d of thr carp ls, par i tal plac nta, w ith 18 to 21 r ow s of anatropous ovul . At th arly d v lopm ntal stag , th ovul show d crassinnuc llat and bit gminous, th inn r int gum nt d g n- rat d w h n th out r int gum nt d v lop d into th sam l v l w ith inn r int gum nt, th matur ovul w as unit gmic. On arch sporial c ll diff r ntiat d from two lay r s b n ath th pid rmis s. T h m gaspor moth r c ll dir ctly d v lop d from th arch sportial c ll w