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प्रश्न
Which of the following is NOT mentioned as a factor promoting pollen tube growth?
विकल्प
Gibberellic acid
Sucrose and carbohydrates
Boron
Calcium
MCQ
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उत्तर
The material specifies five factors that promote pollen tube growth: sucrose/carbohydrates, boron, calcium, enzymes (pectinase and cellulase), and temperature. Gibberellic acid, while known to influence plant growth in general, is not explicitly mentioned as a factor promoting pollen tube growth in this context.
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