• Of all the families of nutrient transporters, the best understood are the potassium transporters. Why do you think that is? Hint - In 2003, the Nobel Prize in Chemistry was awarded jointly to Roderick MacKinnon. Why did the Nobel committee choose to honor this research? Is it because of the importance of potassium channels in plant nutrition?
• Explain this paragraph: “Until recently, most of the research into plants and sulfur was focused on the harmful effects of atmospheric SO2, but lately research efforts have switched to ensuring that plants get adequate S for the metabolic needs. However, lichens and bryophytes continue to be adversely affected by atmospheric SO2”.