摘要:

WILKINSON, H. P., 1992.Leaf anatomy of the Pittosporaceae R. Br.An anatomical study of the leaves of 58 species representing all nine genera has been made. The anatomical characters found to be of most use in distinguishing taxa are: in surface view‐cuticular architecture as seen with the SEM, stomatal outline, occasionally stomatal density, presence/absence of hairs, hair type in adult leaves; in transverse section‐petiole/midrib outline, midrib number of vascular bundles and number of secretory ducts, adaxial epidermis in 1/2 layers, dimensions of adaxial epidermal cells, thickness of outer wall of adaxial epidermis, occasionally chlorenchyma interrupted/not interrupted above the midrib vascular tissue in Pittosporum species; leaf mar

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00415.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

FIALA, B.&MASCHWITZ, U., 1992.Food bodies and their significance for obligate ant‐association in the tree genusMacaranga(Euphorbiaceae).The production of extrafloral nectar and food bodies plays an important role in many tropical ant‐plant mutualisms. In Malaysia, a close association exists between ants and some species of the pioneer tree genusMacaranga(Euphorbiaceae).Macarangais a very diverse genus which exhibits all stages of interaction with ants, from facultative to obligatory associations. The ants nest inside the hollow internodes and feed mainly on food bodies provided by the plants. Food body production had previously been reported only in myrmecophyticMacarangaspecies, where it is usually concentrated on protected parts of the plants such as recurved stipules. We found that non‐myrmecophyticMacarangaspecies also produce food bodies on leaves and stems, where they are collected by a variety of ants. Levels of food body production differ between facultatively and obligatorily ant‐associated species but also among the various non‐myrmecophytes. This may be related to the degree of interaction with ants. Food body production starts at a younger age in the myrmecophytic species than in the transitional or non‐myrmeccophyticMacaranga.Although food bodies of the non‐inhabitedMacarangaspecies are collected by a variety of ants, there is no evidence of association with specific ant species. Our observations suggest that food bodies enhance the evolution of ant‐plant interactions. Production of food bodies alone, however, does not appear to be the most important factor for the development of obligate myrmecophyt

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00416.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

LUQUE, T., 1992.Karyological studies on Spanish Boraginaceae. VI. Contribution to the tribe Eritrichieae.Karyological information is presented forc.15 taxa of the generaAsperugoL.,RocheliaReichenb.,MyosotisL. andLappulaGilib. This paper is the first in this series of karyological studies of Spanish Boraginaceae to deal with Eritrichieae.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00417.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1992.tb00415a.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY