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Rutishauser and Grubert provide new insights into the developmental morphology of a very peculiar, unconventional angiosperm, Mourera fluviatilis (Podostemaceae), a haptophyte that grows attached to rocks in the river rapids of northern South America. (see p. 907)

Epidermal studies

Zhao and Sack describe the cytology of stomatal development in Arabidopsis. They identify markers for stages of precursor cell and guard cell development, which will be useful in analyzing the phenotypes of mutations affecting stomatal patterning and differentiation. (see p. 929)

Pesacreta and Hasenstein present novel data on the internal cuticle of leaves, which show that the cuticle is continuous through the stomatal aperture and along the inner wall of the epidermis, a much more extensive covering than previously thought. Thus, the cuticle surrounds not only the leaf, but more specifically the epidermis, isolating it from the rest of the leaf except where mesophyll cells are in contact with it. The internal cuticle may function to reduce water evaporation from the epidermal layer. (see p. 923)

Genetics of herbicide resistance

Zeng and Baird show that traits for high resistance, intermediate resistance, and susceptibility to the dinitroaniline herbicide oryzalin are multiple alleles of a single nuclear gene in goosegrass (Eleusine indica, Poaceae), one of the world's most serious weeds. (see p. 940)

Wind pollination provides reproductive assurance

In a well-designed, well-executed study Goodwillie documents the role of wind pollination in providing reproductive assurance for a primarily insect-pollinated, self-incompatible annual species, Linanthus parviflorus (Polemoniaceae). Wind pollination may represent an alternative to self-fertilization as an evolutionary solution to fluctuations in pollinator abundance. (see p. 948)

Fire effects

Lesica followed the fate of more than 1000 individual plants of the endangered species Silene spaldingii(Caryophyllaceae) in burned and unburned plots for six summers and determined that fire enhanced population size by increasing the number of new seedlings. (see p. 996)

This Article Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Search for Related Content