How can I get plant Genome size, total number of genes, EST, and chromosomes number How can I get plant Genome size, total number of genes, EST and chromosome number from phytozom and plantDB?
Ensembl plants has a REST API, you might be able to get all these details (except possibly EST numbers) there: http://ensemblgenomes.org/info/access/rest

For example this query gives you the Arabidopsis genome size: http://rest.ensemblgenomes.org/info/genomes/arabidopsis_thaliana?content-type=application/json