Which chemical is released on the stigma by pollen grains?
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it's not chemical but a sugary substance what which help pollen grains to develop his pollen tube
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The stigma, which is the topmost part of the flask-like looking Pistil (female reproductive part of plant) releases a sugary substance when pollen grains fall on their surface. This breaks the pollen sac and the male gamete stats moving towards the ovary for some fun! yeh for fertilization.
Explanation:
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