Hormonal and developmental regulation of two arabinogalactan-proteins in xylem of loblolly pine (Pinus taeda)

被引:10
作者
No, EG
Loopstra, CA
机构
[1] Texas A&M Univ, Dept Forest Sci, College Stn, TX 77843 USA
[2] Texas A&M Univ, Crop Biotechnol Ctr, College Stn, TX 77843 USA
[3] Seattle Biomed Res Inst, Seattle, WA 98109 USA
关键词
D O I
10.1111/j.1399-3054.2000.1100415.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The protein cores of two arabinogalactan-proteins are preferentially expressed at very high levels in differentiating xylem of loblolly pine. Arabinogalactan-proteins are hypothesized to play important roles in xylem development, The objectives of the described research were to identify signals responsible for the regulation of PtX3H6 and PtX14A9 expression and to assess their expression during seedling development. Application of inhibitors of the phytohormones auxin, gibberellic acid, and ethylene to pine seedlings and subsequent northern blot analyses indicate that PtX3H6 expression is suppressed by inhibitors of auxin and ethylene and that PtX14A9 expression is suppressed by all 3 hormone inhibitors. PtX3H6 is first expressed in germinating embryos. Expression of PtX14A9 is not observed until several days later. In young stems, both genes are expressed more in the radially expanding hypocotyls than in elongating epicotyls with PtX14A9 having a higher ratio of hypocotyl to epicotyl expression. These results indicate that PtX3H6 and PtX14A9 are differently regulated during seedling development and that these differences may be mediated by different hormonal signaling.
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页码:524 / 529
页数:6
相关论文
共 23 条
[1]   Analysis of xylem formation in pine by cDNA sequencing [J].
Allona, I ;
Quinn, M ;
Shoop, E ;
Swope, K ;
St Cyr, S ;
Carlis, J ;
Riedl, J ;
Retzel, E ;
Campbell, MM ;
Sederoff, R ;
Whetten, RW .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1998, 95 (16) :9693-9698
[2]   AN AUDIT OF CUSHIONED DIABETIC FOOTWEAR - RELATION TO PATIENT COMPLIANCE [J].
CHANTELAU, E ;
HAAGE, P .
DIABETIC MEDICINE, 1994, 11 (01) :114-116
[3]   IMPORTANCE OF ARABINOGALACTAN PROTEINS FOR THE DEVELOPMENT OF SOMATIC EMBRYOS OF NORWAY SPRUCE (PICEA-ABIES) [J].
EGERTSDOTTER, U ;
VONARNOLD, S .
PHYSIOLOGIA PLANTARUM, 1995, 93 (02) :334-345
[4]   ARABINOGALACTAN-PROTEINS - STRUCTURE, BIOSYNTHESIS, AND FUNCTION [J].
FINCHER, GB ;
STONE, BA ;
CLARKE, AE .
ANNUAL REVIEW OF PLANT PHYSIOLOGY AND PLANT MOLECULAR BIOLOGY, 1983, 34 :47-70
[5]  
HENNION S, 1992, PHYSIOL PLANTARUM, V86, P474, DOI [10.1034/j.1399-3054.1992.860319.x, 10.1111/j.1399-3054.1992.tb01346.x]
[6]   SEASONAL-VARIATION IN ETHYLENE CONCENTRATION IN THE WOOD OF PINUS-SYLVESTRIS L [J].
INGEMARSSON, BSM ;
LUNDQVIST, E ;
ELIASSON, L .
TREE PHYSIOLOGY, 1991, 8 (03) :273-279
[7]  
JENKINS PA, 1974, B R SOC NZ, V12, P737
[8]   ARABINOGALACTAN PROTEINS ARE ESSENTIAL IN SOMATIC EMBRYOGENESIS OF DAUCUS-CAROTA L [J].
KREUGER, M ;
VANHOLST, GJ .
PLANTA, 1993, 189 (02) :243-248
[9]   Arabinogalactan proteins and plant differentiation [J].
Kreuger, M ;
vanHolst, GJ .
PLANT MOLECULAR BIOLOGY, 1996, 30 (06) :1077-1086
[10]  
Little C. H. Anthony, 1995, P281