Endogenous factors which determine the photosynthetic capacity of the leaf were studied in the fully expanded, primary leaves of young seedings of bean (cv. Bulgarian). Following removal of the shoot above the primary leaf node and excision of all axillary buds, the primary leaves increased in area and thickness, in chlorophyll content, in levels of soluble protein, and in the specific activity...

Leaf-area (LA) is a plant-biometric index important to agro-forestry and crop production. Previous works have demonstrated the conservativeness of the inverse of the product of the fresh leaf’s density and thickness the so-called ‘Hughes’ constant’ (K). We use this fact to develop ‘LAMM’, an absolute method of LA measurement (i.e. no regression fits or prior calibrations with planimeters). Nor ...

to investigate the effects of methyl jasmonate growth regulators on growth characteristics, fruit number and fruit yield of ‘semsuri’ melon, an experiment at the field of shahid bahonar university was conducted in summer 2012. melon (cv. ‘semsuri’) is widely cultivated in iran and therefore increasing the fruit yield and quality of this cultivar is necessary. some growth regulators including me...

In situ and light-saturated net photosynthetic rates per unit leaf area were greater in cotton (Gossypium hirsutum L.) plants grown in pots in the field than in similar plants from a phytotron growth chamber. Light-saturated stomatal resistances did not differ in leaves of similar age and exposure on field and chamber plants; lower photosynthetic rates in chamber leaves were associated with gre...

A leaf-disc-test method was used under controlled laboratory conditions to determine the feeding preference of Altica deserticola Latreille (Coleoptera: Chrysomelidae) on leaves two liquorice species, Glycyrrhiza inflata Batalin and G. uralensis Fisch. ex DC. Leaf hardness thickness, cuticle nitrogen tannin contents were compared between liquorices explore their resistance A. deserticola. The l...

Understanding functional trait-environment relationships (TERs) may improve predictions of community assembly. However, many empirical TERs have been weak or lacking conceptual foundation. TERs based on leaf venation networks may better link individuals and communities via hydraulic constraints. We report measurements of vein density, vein radius, and leaf thickness for more than 100 dominant s...

DELUCIA, E. H., and G. P. BERLYN. 1984. The effect of increasing elevation on leaf cuticle thickness and cuticular transpiration in balsam fir. Can. J. Bot. 62: 2423-2431. First-year needles and stems of Abies bnlsnmecr were collected at the end of the growing season along an elevational gradient on Mt. Moosilauke, NH. Tissue was sampled from the base (732 rn), rnidslope ( I 143 rn), forest lim...

The aim of the present work was to evaluate antileishmanial activity of Astronium fraxinifolium and Plectranthus amboinicus. For the in vitro tests, essential oil of P. amboinicus (OEPA) and ethanolic extracts from A. fraxinifolium (EEAF) were incubated with 10(6) promastigotes of L. (Viannia) braziliensis. The OEPA was able to reduce the parasite growth after 48 h; nonetheless, all the EEAFs c...

In the present investigation was carried out to find out the impact of Triadimefon(TDM) and hexaconazole (HEX) triazole fungicides on the leaf anatomy of Radish (Raphanus sativus L.) The plant was treated with one litre of aqueous solution containing 20 mg -1 triadimefon (TDM) and 20mg -1 hexaconazole (HEX) on 23,35 and 53, days after sowing (DAS) by soil drenching. The plants were harvested on...

The stationary volumetric elastic modulus (epsilon(s)) of the leaf cells of three seagrasses (Halophila ovalis (R.Br.) Hook, Zostera capricorni Aschers, and Posidonia australis Hook f.) was evaluated from estimates of epsilon(s) plus intracellular osmotic pressure (epsilon(s) + II(i)) and II(i). The estimates of (epsilon(s) + II(i)) were made using a linear displacement transducer to measure ve...