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Castilleja tenuiflora Benth. is a hemiparasitic plant that is used for medicinal purposes. These hemiparasitic plants are characterized by haustoria – organs that develop on the roots of the parasite and function in host attachment, invasion, and uptake of nutrients and water from the host plant. The hosts of C. tenuiflora are unknown, and the characteristics of its haustoria have not been reported...
Amongst the more outstanding features of columnar cacti, their ribs and spines may vary greatly between and within species. With the implicit assumption that morphometric traits of spines and ribs are inherited, these features have been historically used for taxonomic purposes in Cactaceae. However, some studies show that environmental variables may influence morphology of cacti and thus, some traits...
Phenological analysis provides a useful tool in the study of fruit trees in various aspects, and is mostly based only on morphological characters. In this two years study, morpho-anatomical analyses of vegetative organs were conducted using light and scanning electron microscopy during pomegranate annual cycle. Punica granatum L. cv. Rabbab-e-Neyriz was investigated at six ontogenetic stages. Two...
Romulea bulbocodium is a steno-Mediterranean species found in widely diverse habitats; it shows considerable morphological variations among different populations. The present study used morphological and numerical analyzes to investigate whether and how different habitats affect Italian populations of R. bulbocodium to generate ecological patterns of morphological variation. Individuals from 21 Italian...
Annual alien species are dependent on their sexual reproductive success to establish, maintain and spread their populations. As the annual exotic Impatiens balfourii (Balsaminaceae) is spreading in several temperate countries, we assessed its characteristics linked to sexual reproduction. The reproductive traits and the breeding system which could indicate some trends that might favour population...
The aims of this study were to investigate the effect of prolonged water deficit stress and recovery on phenology, net photosynthesis, leaf features, growth, and seed yield in three Medicago polymorpha populations from dry (Mp-173), middle (Mp-345) and wet (Mp-664) climate regions of Tunisia. After ample irrigation for 30 days, plants of each population were divided into two lots: the first lot was...
The present study aims at clarifying the differences in photosynthesis parameters, oxidative status and antioxidant enzyme activity among ten triticale genotypes in response to salinity stress; and utilizing the traits as biomarkers for identification of salt-tolerant triticale genotypes. The plants were cultivated in a hydroponic system with or without 220mM salt concentration. The plants were analyzed...
Climate projections indicate that temperatures will increase by up to 4.5°C in Europe by the end of this century, and that more extreme rainfall events and longer intervening dry periods will take place. Climate change will likely affect all phases of the life cycle of plants, but plant reproduction has been suggested to be especially sensitive. Here, using a combination of approaches (soil heaters...
Nolana (Solanaceae) is a genus composed of 88 species that inhabit arid and semi-arid environments throughout the Atacama Desert of Chile and Peru, and one from Galapagos Islands. Its greatest diversity is found in coastal localities, termed lomas formations, which are small isolated patches of vegetation sustained by the presence of low cloud layers. Alto Patache corresponds to one of these ecosystems,...
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