Describe phototropism. What plant hormone is responsible for phototropism? Where would this hormone accumulate to initiate the respnse?

Do plants require to adjust the solute types that arrive at the xylem? Name the molecules that assist in adjusting. How is the regulation of the type and quantity of solutes that reach the xylem brought about by the plants?

To transport water from the root into the shoot does the water potential in the xylem need to become more positive or negative? Why?

What is the adaptive advantage or evolutionary advantage being conferred on a plant whose stems are positively phototropic and whose roots are positively gravitropic?

The summer is not optimal for grape growing and you're searching in your memory for something regarding plant hormones.  Explain 2 ways you could utilize plant hormones (choose from auxin, ethylene, cytokinin, gibberellin, abscisic acid, salicylic acid, jasonic acid) to compensate for a problem during growing.  For each way:

Why did plant physiologists propose the existence of a mobile molecule(florigen) that triggers flowering?

Which plant hormone plays key role to switch the plant development from seed dormancy to seed germination? How this plant hormone promotes germination?

Positive phototropism is one of the most obvious aspects of plant growth but the mechanism behind it required considerable experimentation to finally explain. Briefly describe how positive phototropism works, including the processes, structures and/or molecules involved.

Many different treatments were possible in the phototropism experiment. Based on your understanding of phototropism, provide predictions about the direction of plant growth for the following two scenarios, and explain your reasoning. 1. The tip of the coleoptile is removed and lanolin with auxin is applied to the dark side of the stem. 2. The tip of the coleoptile is removed and lanolin with auxin is applied to the light side of the stem.

Contrast primary growth in roots and shoots