Este trabalho aborda o estudo dos grãos de pólen Polygalaceae e Polygonaceae na ilha Algodoal/Maiandeua, representadas, respectivamente, pelas espécies Polygala adenophora DC., P. monticola Kunth, spectabilis variabilis Coccoloba latifolia Lam. C. ramosissima Wedd. Grãos retirados botões florais exsicatas foram acetolisados, medidos, descritos fotomicrografados em microscopia luz eletrônica var...

UNLABELLED PREMISE OF THE STUDY Novel microsatellite markers were characterized in the wind-dispersed and dioecious neotropical tree Triplaris cumingiana (Polygonaceae) for use in understanding the ecological processes and genetic impacts of pollen- and seed-mediated gene flow in tropical forests. • METHODS AND RESULTS Sixty-two microsatellite primer pairs were screened, from which 12 mark...

Bu makalede İstanbul’daki Polygonaceae familyasına ait türler taksonomik yönden incelenmektedir. Türkiye’de 14 cinse hibritler dahil olarak 94 tür ve 9 türaltı takson bulunmaktadır. İstanbul florasında ise Fallopia 2 tür, Persicaria 5 3 alttür, Polygonum Rumex olmak üzere cinslerine toplam 26 alttür rapor edilmektedir. Bunlardan lapathifolia subsp. nodosa taksonu Türkiye Florası için yeni kayıt...

BACKGROUND AND AIMS Rheum, a highly diversified genus with about 60 species, is mainly confined to the mountainous and desert regions of the Qinghai-Tibetan plateau and adjacent areas. This genus represents a good example of the extensive diversification of the temperate genera in the Qinghai-Tibetan plateau, in which the forces to drive diversification remain unknown. To date, the infrageneric...

A new leaf spot disease was observed on leaves of Rheum palmatum (Chinese rhubarb) in Northwest China (Gansu Province) starting in 2005. A Septoria-like fungus was isolated and completion of Koch's postulates confirmed that the fungus was the casual agent of the leaf spot disease. Morphology and molecular methods were combined to identify the pathogen. The fungus produced conidiomata pycnidia a...

Species differences in patterns of phenotypic plasticity may be an important aspect of adaptive diversity. Plasticity for functionally important root traits was studied in inbred field lineages of Polygonum persicaria and P. cespitosum (Polygonaceae). Replicate seedlings were grown in plexiglass rhizotrons under a range of constant and temporally variable moisture treatments. Plasticity was det...