A FAMILY OF WOUND-INDUCED GENES IN POPULUS SHARES COMMON FEATURES WITH GENES ENCODING VEGETATIVE STORAGE PROTEINS

被引:44
作者
DAVIS, JM
EGELKROUT, EE
COLEMAN, GD
CHEN, THH
HAISSIG, BE
RIEMENSCHNEIDER, DE
GORDON, MP
机构
[1] US FOREST SERV,N CENT FOREST EXPT STN,RHINELANDER,WI 54501
[2] OREGON STATE UNIV,DEPT HORT,CORVALLIS,OR 97331
[3] UNIV WASHINGTON,DEPT BIOCHEM SJ70,SEATTLE,WA 98195
关键词
BARK STORAGE PROTEIN; GENE CLUSTERING; RFLP; SYSTEMIC RESPONSE;
D O I
10.1007/BF00021426
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Two wound-inducible cDNAs from poplar leaves show sequence identity to vegetative storage proteins (VSP) that accumulate seasonally in poplar bark tissues. We have compared the genomic organization, cDNA sequences and expression of the genes encoding the wound-inducible cDNAs (win4) with that of a bark VSP (called bark storage protein, or BSP). There appear to be several win4 genes in the poplar genome which segregate as a single locus and are therefore likely to be clustered. The same is true of the BSP genes. The win4 locus is linked (map distance of 5 cM) to the BSP locus, consistent with a common evolutionary origin of the genes. A near full-length win4 cDNA shows 75% sequence identity to BSP cDNAs. Both win4 and BSP are systemically wound-inducible; win4 transcripts accumulate in leaves and stems, whereas BSP transcripts accumulate almost exclusively in stems. A phloem transport-dependent signaling mechanism appears to be involved in systemic win4 expression after wounding. In contrast to BSP gene expression, win4 genes are not expressed in response to short day conditions. The data indicate win4 and BSP genes are differentially regulated, and their products may play important roles in the storage and reallocation of nitrogen in perennial plants.
引用
收藏
页码:135 / 143
页数:9
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