( L um nitzera) ) Vol. 43 No : Q Lasershar 200. ] Carlquist [6 ] Noshiro [7 ] (19 54 N, E) + Oda (1983) racemosa),

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1 43 3 ( ) Vol 43 No Journal of Xiamen University (Natural Science) May 2004 : (2004) ( L um nitzera) 1, 1 2, (1, ;2, ) : 2 Lasersharp :1) ;2) ;3) ;4) : ; ; : Q 13 :A ( L um nitzera) ( Com2 cm, bretaceae), ( L littorea) ( L racemosa),, [1,2 ],, [1 3 ] 5, 36, 1 2, [4 ] [5 (19 54 N, E) + ] Carlquist ] Noshiro [7 ], 8 28 %, p H 3 35, 2 83 %, Cl % 10 a, 2 m, : : ( ) : ( ),,,, : E2mail com Lasershar 30, 2 Oda (1983) [8 ] 1) China Academic Journal Electronic Publishing House All rights reserved

2 3 : ( L um nitzera) 407 ( I, 12) ( I, 13), ), 2 4 ( I, 14),, ( I, 1) ( I, 15) 2), 2 2, ( ) 1,,,, ( ) ( I, 2),, : ( I, 3) ( I, 4) 1) ( ), ( I, 5) (TD, RD), ( I, 6) ( ( PD), I, 7), 3), ( ESC), ( 2) ( ) ( TD) 3 3 ) 50 ( ) ( TD50) ( 4), ) ( RD) 50 ( ),, (RD50) ( ) ( PA) 50 ( I, 8) 2, ( I, 9) 3) (VCS), 5),, : (1), 3 ( I, 10) ; (2) ( I, 11) 3 1 L littorea L 6),,,,, 1 ( ) Tab 1 Quantitative wood anatomical features of vessel elements and pores of L um nitzera species( X SD) PD / mm 2 VCS / cluster PA 2 PA racemosa TD TD RD RD50 ESC PD : ; VCS : ; PA : ; TD : ; PA50 :50 ; RD50 :50 ; RD : ; ESC : ; TD50 :50, ( ) ( PA50), China Academic Journal Electronic Publishing House All rights reserved

3 408 ( ) 2004, Carlquist, :,, ] 4 : [13,14 1) Zimmermann : ],, ;, [9,, ] ( ) 6) : [15,16 2), ] 6 ], : (1),, 3 2,,,, :,9 ] (2) [17, ] Tomlison :, [10 ],, ( A vicennia m arina) ( Ceriops ta2 : gal) [17 ] 3) Haagen2Poiseuille, [18 ] :d V / d t = L p ( d P/ d l ) L p = r 4 / ( 8 ), (, (d V / d t, d P/ d l, L p ), r, ),, ],, 20 m, m, Carlquist :, ],, [11,12 ],, 4) [19 Carlquist : ], :, ( ),, ], 5), China Academic Journal Electronic Publishing House All rights reserved

4 3 : ( L um nitzera) 409 trees and forests in Micronesia [J ] Forest Ecology and, Management, 1999, 117 : [4 ] ( ) [ M ] :,1996, ( [5 ] IAWA Committee IAWA list of microscopic feactures 3 ), for hardwood identification [J ] IAWA Bull NS, 1989,, ( 10 : , ) ] Carlquist S Comparative Wood Anatomy [ M ] Berlin :,, Springer2Verlag, 1988,, [ 7 ] Noshiro S, Joshi L, Suzuki M Ecological wood anatomy, Plant Res, 1994, 107 : [1 ],,, [8 ] Oda K Anatomical structure of Okinawan mangrove trees[j ] The Sub2Tropical Forest, 1983, 5 :80-89 [9 ] Zimmermann M H Xylem Structure and Ascent of Sap 3 3 [ M ] Berlin : Springer2Verlag,1983, : 1 ( I, 4), [11 ] Shane M W, McCully M E, Canny M J Architecture ( 5) of branch2boot junctions in maize : structure of the con2 1 ( I, 16), ( necting xylem and the porosity of pit membranes [J ] I, 17), Annals of Botany, 2000, 85 : ( I, 18) [12 ] Shane M W, McCully M E, Canny M J The vascular system of maize stems revisited : implications for water, transport and xylem safety [ J ] Annals of Botany, Carlquist : 2000, 86 : :, [13 ] Biles C L, Abeles F B Xylem sap proteins [J ] Plant, Physiolo, 1991, 96 : , [14 ] Zimmermann U, Zhu J J, Meinzer F, et al High ], molecular weight organic compounds in the xylem sap of 2 mangroves: implications for long2distance water trans2, port [J ] Botanica Acta, 1994, 107 : ,[15 ], [J ],1997,17 (1) :65-71,, [16 ], 10, Melastomataceae Onagraceae [20,21 ] [J ],, 1998,22 (2) : ,, nitzera rosea ( Combretaceae) 2its status and floral mor2, phology[j ] J Arnold Arbor, 1978, 59 : : [1 ] Lin P Mangrove Ecosystem in China [ M ] Beijing :Sci2 ence press,1999 [ 2 ] Tomlinson P B The Botany of Mangrove [ M ] London : Cambridge University Press,1986 [ 3 ] Cole T G, Ewel K C, Devoe N N Structure of mangrove of A lus nepalensis ( Betulaceae) in east Nepel [ J ] J [10 ] Tyree M T Evolution of xylem conduits [J ] IAWA Bulletin, 1994, 15 : [17 ] Tomlison P B, Bunt J S, Primack R B, et al L um2 [18 ] Parlange J Y, Turner N C, Waggoner P E Water up2 take, diameter change and nonlinear diffusion in tree stems [J ] Plant Physiolo, 1975, 55 : [ 19 ] Mauseth J D, Plemones2Rodriguez B J Evolution of ex2 treme xeromorphic characters in wood : a study of nine evolutionary lines in Cactaceae [J ] American Journal of Botany, 1998, 85 (2) : China Academic Journal Electronic Publishing House All rights reserved

5 410 ( ) 2004 [20 ] ter Welle B J H, Koek2Noorman J Wood anatomy of the neotropical Melastomataceae [ J ] Blumea, 1981, 27 : [21 ] Carlquist S Wood anatomy of Onagraceae, with notes on alternative modes of photosynthate movement in di2 cotyledon woods [J ] Ann Mo Bot Gard, 1975, 62 : Study on Wood Anatomy of L um nitzera Species DEN G Chuan2yuan 1, L IN Peng 1, GUO Su2zhi 2 (1 School of Life Sciences, Xiamen U niversity, Xianmen ,China ; 2 Test Center, Fujian Agricult ure and Forest ry U niversity, Fuzhou ,China) Abstract : The morphological features in secondary xylem of 2 L um nitzera species were surveyed in details by means of optical microscope, scanning elect ronic microscope and laser scanning confocal microscope The quanti2 tative feat ures in secondary xylem were measured by means of software Lasersharp These result s showed as fol2 lows : 1) wood structures are adaptive to the intertidal habitats 2) the differences in wood structure between L littorea and L racemosa presumably stem f rom t he different ecological sites t hat two species occupy 3) t he differences in vest uring between L littorea and L racemosa can be served as t he diagnostic feat ures 4) t he differences in pore diameter, pore density and vest ured pit s between L littorea and L racemosa tend to sup2 port the viewpoints claimed by Carlquist : vesturing is regarded as helpful to conductive safety Key words : L um nitzera ; wood anatomy ; Mangrove species ( Explanation of Plate) ,, ( 100) 2, 3, 4, 5, ( 3 500) 6, ( 500) 7, ( 350) 8, ( 3 500) 9, 2, ( 2 000) 10, 11, ( 7 500) 12, ( 1 500) 13, ( 1 000) 14, ( 3 500) 15, 16, 17, 18, ( 7 500) China Academic Journal Electronic Publishing House All rights reserved

MODULE DESCRIPTOR CREDIT VALUE PARTNER INSTITUTION. Prerequisites None

MODULE DESCRIPTOR CREDIT VALUE PARTNER INSTITUTION. Prerequisites None DESCRIPTOR TITLE CODE DATE OF APPROVAL SCHOOL Tree Biology MR1016(L4) April 2008 Built & Natural Environment CREDIT VALUE PARTNER INSTITUTION 20 Credits VERSION NUMBER 4 Myerscough College RELATIONSHIP