BACKGROUND AND AIMS Grapevines growing in Australia are often exposed to very high temperatures and the question of how the gas exchange processes adjust to these conditions is not well understood. The aim was to develop a model of photosynthesis and transpiration in relation to temperature to quantify the impact of the growing conditions on vine performance. METHODOLOGY Leaf gas exchange was...

Two new species of the leafhopper subgenus Empoasca (Empoasca) namely, E. (E.) dorsodenticulata Yu & Yang, sp. n. and E. (E.) spiculata Yu & Yang, sp. n. from China are described and illustrated and a key provided for Chinese subgenera of Empoasca.

Analyses of space-time statistical features of a flavescence dorée (FD) epidemic in Vitis vinifera plants are presented. FD spread was surveyed from 2011 to 2015 in a vineyard of 17,500 m2 surface area in the Piemonte region, Italy; count and position of symptomatic plants were used to test the hypothesis of epidemic Complete Spatial Randomness and isotropicity in the space-time static (year-by...

Introduction Raisin allergy is uncommon despite worldwide cultivation of grapes, which belong to the Vitis vinifera species of the Vitaceae family. There have only been rare reports of anaphylaxis in adults related to the consumption of grapes, wine or other grape products, mostly in Europe [1-4]. In children, even fewer case reports to grape exist [5]. We report an 8-year-old patient who devel...

Ericoid mycorrhizal fungi differ in their abilities to use nitrogen sources and may be integral to maintaining fungal and plant diversity in ecosystems in which Ericaceae occur. In this study, we tested whether the fungal communities differ among three species of co-occurring Ericaceae. Fungi colonizing Cassiope tetragona, Empetrum nigrum and Vaccinium vitis-idaea roots in the Arctic tundra wer...

It has recently been proposed that microrefugia played an important role in species survival during past climate change events. However, the current distributions of microrefugia remain largely unknown. Wind-hole sites are areas affected by preferential flows of cool air generated in interstitial spaces created by rock fragments or colluvia. Alpine plant species occurring in lowland wind-hole s...

BACKGROUND AND AIMS Despite the widespread use of dwarfing rootstocks in the fruit-tree industry, their impact on tree architectural development and possible role in the within-tree balance between growth and flowering are still poorly understood, in particular during the early years of growth. The present study addressed this question in apple trees, through a detailed analysis of shoot popula...

(ibl)berellinl-like stulstances occtlr in mianv higher pllants (1 2, 17, 20). and sexeral have beenl idenitified (12). Tlhe presence of gibberelliln-like activity in seedless fruit, of V'itis v'iiifcra L. was (lenlonstrated in 1960 by Coombe (1). Although it seemiis probable that sulch a widely spread hormonie also would be invxolved in the groxwth of seede(d fruit, Coombe was unable to demnons...

Phenolic compounds were extracted from European and Japanese grapevine species (Vitis vinifera and V. coignetiae) seeds using 80% methanol or 80% acetone. The total content of phenolic compounds was determined utilizing Folin-Ciocalteu's phenol reagent, while the content of tannins was assayed by the vanillin and BSA precipitation methods. Additionally, the DPPH free radical and ABTS cation rad...