How to understand this use of "sareru" in 「植物が成長を妨げられる」?


What does this mean?

> 植物が成長を妨げられる。

Can I get a more detailed overlook of 貰わせる and rareru and saseru and all those
things depending on whether wo ni ga or whatever is used. It's really
frustrating to not be able to understand how their relations work with each
other and who you are referring to.

For example:

> ネロが家族を殺された。

Does that mean that Nero had his family killed (His family was killed by
someone else and they got killed.)?




> 植物が成長を妨げられる

OP - What does this mean?

  * "[The] plant[s] had [their] growth stunted." (by something)

> ネロが家族を殺された.

OP - Does that mean that Nero had his family killed (His family was killed by
someone else and they got killed.) ?!?

  * "Nero had [his] family killed." 

**Not meaning specifically that he asked someone to kill his family** , but
rather that he **_had this happen_** to him. He received the result of the
action.

(Though Roman Emperor Nero did kill his mother, so there might be other
possible interpretations.)

を＋…られる・される（を＋受身形）is usually indicating that the subject/topic is **not the
actor performing the action** , but rather is **the receiver of the result of
the action** (usually something undesirable).

There is a very good explanation in Japanese about this kind of construction
here:  
<http://www.tomojuku.com/blog/passive/passive-4/>

