Just like phototropism, gravitropism is also caused by an unequal distribution of auxin. When a stem is placed horizontally, the bottom side contains more auxin and grows more - causing the stem ...

This dual function highlights the complexity of auxin signaling and its impact on processes such as gravitropism and root growth inhibition[1][2]. Another significant area of research has been the ...

The researchers found a novel mechanism in which auxin production is stimulated by ABA, leading to increased root gravitropism and the ability to grow at steeper angles in response to drought.