How do Auxins promote the growth of a tendrils around a support??
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ᴀᴜxɪɴ ɪs ᴘʟᴀɴᴛ ʜᴏʀᴍᴏɴᴇ ᴡʜɪᴄʜ ɪs sʏɴᴛʜᴇsɪᴢᴇᴅ ᴀᴛ ᴛʜᴇ ᴛɪᴘ ᴏғ ᴛʜᴇ sʜᴏᴏᴛ. ɪᴛ ʜᴇʟᴘs ᴛʜᴇ ᴄᴇʟʟ ɢʀᴏᴡ ʟᴏɴɢᴇʀ. ᴡʜᴇɴ ᴀ ᴛᴇɴᴅʀɪʟ ᴄᴏᴍᴇs ɪɴ ᴄᴏɴᴛᴀᴄᴛ ᴡɪᴛʜ ᴀ sᴜᴘᴘᴏʀᴛ, ᴀᴜxɪɴ sᴛɪᴍᴜʟᴀᴛᴇs ғᴀsᴛᴇʀ ɢʀᴏᴡᴛʜ ᴏғ ᴛʜᴇ ᴄᴇʟʟs ᴏɴ ᴛʜᴇ ᴏᴘᴘᴏsɪᴛᴇ sɪᴅᴇ ᴛʜᴀᴛ's ᴡʜʏ ᴛʜᴇ ᴛᴇɴᴅʀɪʟ ғᴏʀᴍs ᴀ ᴄᴏɪʟ ᴀʀᴏᴜɴᴅ ᴛʜᴇ sᴜᴘᴘᴏʀᴛ.
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When the tip of a tendril touches a support , then the auxins present in its tip move to that side of tip which is away from the support . Auxins promote growth . So due to more auxins in it , the side of tendril away from the support grows faster than the side which is in contact with the support and makes the tendril twirl around the support .
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