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The complexities of Arabic phonology have been documented in detail in particular in the dialectological and theoretical phonological traditions. In this paper we argue for the incorporation of a third perspective into Arabic linguistics, an Arabic-internal typological perspective. Eleven geographically representative dialects are compared along a common parameter, the structure of simple CaCaC nouns and verbs, followed by the addition of first one, then two suffixes. The suffixes are either identical across the noun/verb categories or are closely parallel. These basic structures are treated descriptively, and in addition two quantified indices, a paradigm diversity index and a consistency index are developed to facilitate a comparative overview. The phonological parameters are fundamental to Arabic: the treatment of short stressed/unstressed vowels in open syllables, constraints on CCC sequences or trisyllabic syncope for instance. What emerges is a cline of increasing phonological complexity as one, then two suffixes are added. Most striking, however, is the role played by morphophonology in informing the ever increasing degree of variation among the eleven dialects. Arabic syllabic phonology and morphophonology emerges as paradoxically at one and the same time, parsimonious and complex. A very few phonological rules produce a very high degree of contrastive forms among the eleven dialects. [ABSTRACT FROM AUTHOR]

The objective of this study was to investigate the foliar endophyte biodiversity of white spruce (Picea glauca (Moench) Voss to establish a baseline for future comparative studies examining the impact of forestry practices. It identifies for the first time endophytic fungi living inside the needles of white spruce from 280 needles collected in seven natural stands in southern Québec. The endophyte colonization rate on surface sterilized needles was 53.2%. We performed a PCR-RFLP and sequence analysis on the ITS region of the nuclear ribosomal DNA to achieve molecular identification. Isolate ITS sequences were compared with data from GenBank presenting the best similarity and were analyzed by a maximum of parsimony and Bayesian inference. Relationships between morphological groups, digestion groups, and sequence groups were investigated. In all, 23 morphotypes were found to belong to 14 sequence groups and we demonstrated that morphological groups are poor indicators for estimating species diversity. This study is the first to establish species richness values for foliar endophytes. Among the 141 isolates in this study, 75.15% have a high sequence similarity with Lophodermium piceae, 10.95% with an unknown species of Mycosphaerella, and 5.5% with two species of the genus Hypoxylon. Distribution, incidence and biological significance of all the endophytes found in this study are discussed. [ABSTRACT FROM AUTHOR]