IANAL (I Am Not A Lawyer), and this is an unqualified opinion alone, not a legal advice, but I'd say no, since there's no proven intent to harm oneself, so it couldn't be interpreted under section 309.
I asked a related question here if any government has issued an official recommendation regarding Mars One application, but sadly it didn't yet result in any answers. I've also been digging around on my own and found some criticism of the Mars One project from a legal perspective, but so far it seems no government has decided to issue an official position regarding this project, let alone passed any laws that would specifically list it as means of self-harm.
So, unless there's a clear declaration from the government that they would consider any such application as a suicidal act, and pass that as a law, I'd wager that they legally can't even consider it as such in the courts of law. And human exploration of space clearly isn't listed as such in broader terms either, if the government sponsors ISRO (Indian Space Research Organisation) a Human Flight Initiative program.
However, searching again for any government issued warning regarding Mars One project, I stumbled upon this news article, dated February 20, 2014:
Gulf imams issue fatwa warning Muslims not to live on Mars as it
would pose 'a real risk to life'
According to reports in the Khaleej Times, a fatwa committee under the
General Authority of Islamic Affairs and Endowment in the UAE,
prohibits Muslims from being involved in such a journey as it would
pose "a real risk to life" and is tantamount to suicide.
The report emerged after more than 500 people from Saudi Arabia and
other Gulf countries were said to have signed up for a spot on the
Mars One mission.
If this fatwa (a legal opinion or ruling issued by Islamic scholars) extends to Muslims in India, or if it was later adopted by their muftis, that I wouldn't know.
One thing I want to add is that Mars One candidate selection and training processes should prevent inclusion of candidates with suicidal tendencies or those that are otherwise unstable or unfit for the tasks ahead of them. Mars One's candidate selection process is fairly complex, so I won't describe it in detail, but suffice to say that candidates will be under supervision of trained professionals while undergoing years long selection and later extremely demanding training. Round 3 and round 4 of the selection process will also be public events, broadcast on TV and internet, with fierce competition between candidates themselves, which should help expose any current or past self-harming tendencies of individual candidates, too.