The element known to be involved in the polarized growth of pollen tube is?

Potassium

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Magnesium

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Sodium

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Calcium

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Solution

The correct option is B Potassium
The pollen tube paves its way through the solid part of the stigma and style by secreting pectinases and hydrolytic enzymes. Pollen tube travels inter-cellularly and chemotropically along the concentration gradient of the calcium-boron-inositol sugar complex.
Thus the correct answer is option A.

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