MOLECULAR CONTROL OF FLOWER DEVELOPMENT IN ARABIDOPSIS
拟南芥花发育的分子控制
基本信息
- 批准号:3468491
- 负责人:
- 金额:$ 10.17万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:1991
- 资助国家:美国
- 起止时间:1991-08-01 至 1996-07-31
- 项目状态:已结题
- 来源:
- 关键词:Arabidopsis developmental genetics gene expression gene interaction gene mutation genetic enhancer element genetic manipulation genetic regulatory element homeobox genes in situ hybridization laboratory rabbit molecular cloning nucleic acid sequence plant genetics plant growth /development site directed mutagenesis suppressor mutations temperature sensitive mutant transposon /insertion element
项目摘要
Research in my laboratory is focused on understanding the processes
controlling flower development in the crucifer Arabidopsis thaliana. In
Arabidopsis, mutations in the homeotic regulatory gene Apetala2 (Ap2) can
cause the homeotic transformation of sepals to carpels and petals to
stamens, as well as other dramatic changes in floral organ development.
Clearly, the Apetala2 gene plays a central role in determining the identity
of floral organ primordia and the regulation of plant reproduction.
However, nothing is known about the function of this gene at the molecular
level. Recently, my colleagues and I cloned the Ap2 gene from Arabidopsis
by insertional mutagenesis. Analysis of the Ap2 nucleotide sequence has
not provided any meaningful clues to this gene's function in the cell.
Therefore, the experiments in this proposal are designed to generate new
molecular and genetic insights into the structure of Apetala2, the temporal
and spatial regulation of this gene during Arabidopsis development, and its
interactions with other gene loci involved in the genetic control of flower
development. First, to identify structurally and/or functionally important
regions of the Ap2 gene we will compare the nucleotide sequence of wildtype
Ap2 and its flanking DNA sequences with several chemically induced mutant
alleles. In addition, we will determine whether several interesting motifs
in the Ap2 amino acid sequence are critical for this gene's function by
generating a set of new mutant alleles using in vitro site-directed
mutagenesis in conjunction with the transformation of these mutant genes
back into Arabidopsis. A second goal of our research is to understand how
Ap2 interacts with other Arabidopsis gene loci involved in the regulation
of floral organogenesis. To define the interactions and/or epistatic
relationships between Ap2 and other known regulatory gene loci, we propose
to look at the temporal and spatial regulation of Ap22 gene expression in
mutant plants using in situ hybridization and immunolocalization
procedures. Finally, to identify new genes that interact with Ap2 to
determine the identity of floral organ primordia, we propose to screen
mutagenized ap2 plants for modifiers of the homeotic phenotype -- dominant
enhancer and suppressor mutants of ap2. This genetic screen should
identify additional elements of the regulatory network controlling flower
development including regulators, cofactors, as well as downstream target
genes of ap2. Together, these studies should provide new insight into the
molecular processes controlling plant pattern formation and reproduction.
我实验室的研究重点是了解
控制十字花科植物拟南芥的花发育。 在
在拟南芥中,同源异型调控基因Apetala 2(Ap 2)的突变可以
导致萼片向心皮和花瓣的同源异型转化,
雄蕊,以及花器官发育的其他戏剧性变化。
很明显,Apetala 2基因在决定
花器官原基的发育和植物生殖的调控。
然而,对于该基因在分子水平上的功能,
水平 最近,我和同事从拟南芥中克隆了Ap 2基因,
通过插入诱变。 Ap 2核苷酸序列的分析
没有提供任何有意义的线索,这个基因的功能在细胞中。
因此,本提案中的实验旨在产生新的
Apetala 2结构的分子和遗传学见解,
拟南芥发育过程中该基因的空间调控,
与花的遗传控制中涉及的其他基因位点的相互作用
发展 首先,确定结构和/或功能上重要的
我们将比较野生型Ap 2基因的核苷酸序列
Ap 2及其侧翼DNA序列与几种化学诱导突变体
等位基因。 此外,我们将确定是否有几个有趣的图案
在Ap 2氨基酸序列中的氨基酸序列对该基因的功能至关重要,
使用体外定点突变产生一组新的突变等位基因,
诱变结合这些突变基因的转化
回到拟南芥中。 我们研究的第二个目标是了解
Ap 2与其他参与调控的拟南芥基因位点相互作用
花器官发生的过程 定义相互作用和/或上位性
Ap 2和其他已知的调控基因位点之间的关系,我们建议
观察Ap 22基因表达的时间和空间调控,
利用原位杂交和免疫定位的突变体植物
程序. 最后,为了鉴定与Ap 2相互作用的新基因,
确定花器官原基的身份,我们建议筛选
诱变的ap 2植物用于同源异型表型修饰--显性
AP 2的增强子和抑制子突变体。 这种基因筛查应该
确定控制花卉的调控网络的其他要素
包括调节子、辅因子以及下游靶点的开发
ap 2基因 总之,这些研究应该提供新的见解,
控制植物格局形成和繁殖的分子过程。
项目成果
期刊论文数量(0)
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JACK K OKAMURO其他文献
JACK K OKAMURO的其他文献
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{{ truncateString('JACK K OKAMURO', 18)}}的其他基金
MOLECULAR CONTROL OF FLOWER DEVELOPMENT IN ARABIDOPSIS
拟南芥花发育的分子控制
- 批准号:
3468490 - 财政年份:1991
- 资助金额:
$ 10.17万 - 项目类别:
MOLECULAR CONTROL OF FLOWER DEVELOPMENT IN ARABIDOPSIS
拟南芥花发育的分子控制
- 批准号:
3468489 - 财政年份:1991
- 资助金额:
$ 10.17万 - 项目类别:
MOLECULAR CONTROL OF FLOWER DEVELOPMENT IN ARABIDOPSIS
拟南芥花发育的分子控制
- 批准号:
2183793 - 财政年份:1991
- 资助金额:
$ 10.17万 - 项目类别:
MOLECULAR CONTROL OF FLOWER DEVELOPMENT IN ARABIDOPSIS
拟南芥花发育的分子控制
- 批准号:
2183794 - 财政年份:1991
- 资助金额:
$ 10.17万 - 项目类别:
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