Como muar gradient para webkit-filter

Caros, boa noite.

Tenho o css:

.filter-gradient.green:after{
/ IE9 SVG, needs conditional override of 'filter' to 'none' /
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(45deg, rgba(52,143,80,1) 0%, rgba(86, 211, 146, 0.75) 100%); / FF3.6+ /
background: -webkit-gradient(linear, left bottom, right top, color-stop(0%,rgba(52,143,80,1)), color-stop(100%,rgba(86, 211, 146, 0.75))); / Chrome,Safari4+ /
background: -webkit-linear-gradient(45deg, rgba(52,143,80,1) 0%,rgba(86, 211, 146, 0.75) 100%); / Chrome10+,Safari5.1+ /
background: -o-linear-gradient(45deg, rgba(52,143,80,1) 0%,rgba(86, 211, 146, 0.75) 100%); / Opera 11.10+ /
background: -ms-linear-gradient(45deg, rgba(52,143,80,1) 0%,rgba(86, 211, 146, 0.75) 100%); / IE10+ /
background: linear-gradient(45deg, rgba(52,143,80,1) 0%,rgba(86, 211, 146, 0.75) 100%); / W3C /
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#348f50', endColorstr='#de56b4d3',GradientType=1 ); / IE6-8 fallback on horizontal gradient /

}

Não consigo mudar para blur, hotate, invert, sepia, grayscale do webkit-filter.

Por favor, alguém pode me ajudar.

Não quero utilizar um sistema online para gerar gradient, quero utilizar webkit-filter.

Muito obrigado.