Question

Why the pollen tube ruptures only left side synergid during double fertilisation ?

Answer 1

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Here's your answer!!
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✶ Synergid is just one of the two cells which are present in the embryo sac of a flowering plant. It also nourishes the ovum. Double fertilization is just the process of forming a zygote and endosperm.

✶ During this process, the pollen tube starts growing into one of the symergid cells (left), then, it ruptures and releases it's two sperm cells into this cell.

✶ The synergid cells contain an elaborated cell wall in their mycropolar poles which helps in guidance and reception of pollen tube. Synergid cells also produce an attractant that guides the pollen to the female genytophyte.
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