They draw water by their roots. They catch all sorts of diseases. Those diseases again are cured by various operations. From this it is clear that trees have perception of taste.
पादैः सलिलपानाच्च व्याधीनां चापि दर्शनात्। व्याधिप्रतिक्रियत्वाच्च विद्यते रसनं दुमे॥