We investigated light acclimation in seedlings of the temperate oak Quercus petraea (Matt.) Liebl. and the co-occurring sub-Mediterranean oak Quercus pyrenaica Willd. Seedlings were raised in a greenhouse for 1 year in either 70 (HL) or 5.3% (LL) of ambient irradiance of full sunlight, and, in the following year, subsets of the LL-grown seedlings were transferred to HL either before leaf flushi...

Early season leaf growth requires a large amount of nitrogen, and the amount of N provided for new leaf development has been well tested. Although shoot position within the crown strongly influences leaf properties, little is known about absorbed and remobilized nitrogen allocation in the tree crown. Thus, we investigated differences in the allocation of recently absorbed nitrogen in the tree c...

Abstract Q. liaotungensis is an important drought-resistant tree species in Northeast China where the climate dry and rainless. In this study, we performed a deep transcriptomic sequencing leaves, including de novo assembly functional annotation for screening candidate genes involved drought avoidance. A total of 25,593 unigenes were obtained from Illumina platform. According to Gene Ontology K...

, ABSTRACT. 1. The preference of Corythucha arcuata (Say) (Heteroptera: Tingidae) for the foliage of Quercus alba L. (Fagaceae) grown under water deficit was examined. Potted Q.alba saplings were grown under controlled levels of water deficit in a glasshouse. Adult C. arcuata were exposed to excised Q.alba foliage under controlled conditions in a growth chamber, and feeding preference assessed ...

Many leaves survive the severing of their major veins in apparently excellent health. According to the classical explanation, the leaf minor veins provide "conductive overload," an excess of parallel conductive paths, rendering the major veins hydraulically dispensable. Whether such an excess of conductive paths exists has important implications for vascular design and for leaf response to vasc...

The potential differentiations in litter chemistry among native and non-native trees are poorly understood. We compared the chemical composition of leaf litterfall of 11 exotic tree species, e.g. coniferous: Abies cephalonica, A. grandis, A. procera, Chamaecyparis pisifera, Pinus peuce, Pseudotsuga menziesii, Thuja plicata, and deciduous: Acer rubrum, A. saccharum, Betula alleghaniensis and Que...

Sida acuta Burm.f. (Fam. Malvaceae) is used in Siddha system of medicine and in folk medical practice in Tamil Nadu under the names Arivalmooku pachilai or vattatiruppi. The leaves of this plant are used for their diuretic, demulcent, anthelmintic and wound healing properties. The present paper discusses the anatomy of petiole leaf and stem, microscopic constants, physico-chemical standards and...