Key points are not available for this paper at this time.
Charles C. Mann's article “Genetic engineers aim to soup up photosynthesis” (News Focus, 15 Jan. p. 3141) suggests an improved RuBisCO enzyme to “lower crops' need for nitrogen.” A second article by Dennis Normile (News Focus, 15 Jan. p. 3132) suggests that erect leaves are necessary
Sinclair et al. (Fri,) studied this question.