نتایج جستجو برای: seedling death
تعداد نتایج: 288147 فیلتر نتایج به سال:
Pathogenic effects of 6 Fusarium spp., viz., F. equiseti, F. longipes, F. scirpi (Section Gibbosum), F. oxysporum (Section Elegans), F. pallidoroseum (Section Arthrosporiella) and F. solani (Section Martiella) were studied on sunflower plants. Symptoms produced by Fusarium spp., were root-, collar-, stemand seedling rots, damping-off, stunting, wilting, tip burning and reduction in growth. Wilt...
background avoidable mortality as an indicator for assessing the health system performance has caught the attention of researchers for a long time. in this study we aimed to compare the health system performance using this indicator in rural and urban areas of one of iran’s southern provinces. methods all deaths (29916) which happened during 2004–2011 in bushehr province were assessed. nolte ...
BACKGROUND AND AIMS The lack of studies assessing the simultaneous expression of tolerance and resistance traits during seedling development and overall seedling defences as compared with adult plants, in general, constitutes a significant research need that can greatly improve our understanding of overall investment in defences during plant ontogeny. METHODS Using two seedling and two juveni...
BACKGROUND AND AIMS The response of forest herb regeneration from seed to temperature variations across latitudes was experimentally assessed in order to forecast the likely response of understorey community dynamics to climate warming. METHODS Seeds of two characteristic forest plants (Anemone nemorosa and Milium effusum) were collected in natural populations along a latitudinal gradient fro...
We used parentage analysis to estimate seedling recruitment distances and genetic composition of seedling patches centred around reproductive trees of the animal-dispersed Neotropical canopy palm Iriartea deltoidea in two 0.5 ha plots within second-growth forest and one 0.5 ha plot in adjacent old-growth forest at La Selva Biological Field Station in north-eastern Costa Rica. Seedlings were sig...
An investigation was initiated to examine the effects of carbon soot collected from exhaust tube of 15 years old petrol and diesel operated vehicles on gram seed germination and biochemical changes of seedling. In view of the widespread cultivation of gram seed in India and long-term impact of black carbon is the warming of the atmosphere as per the recommendation of IPCC (2007). Black soot wer...
Negative population feedbacks mediated by natural enemies can promote species coexistence at the community scale through disproportionate mortality of numerically dominant (common) tree species. Simultaneously, associations with arbuscular mycorrhizal fungi (AMF) can result in positive effects on tree populations. Coupling data on seedling foliar damage from herbivores and pathogens and DNA seq...
Bridging the Gap: Influence of Seed Deposition on Seedling Recruitment in a Primate-tree Interaction
Frugivores are thought to influence plant recruitment by creating initial seed deposition templates. However, post-deposition processes (e.g., predation) may obscure these initial patterns. Few studies have examined successive life-history stages of animaldispersed plants to evaluate how initial frugivore seed deposition influences early life stages of plant recruitment. We addressed this issue...
in this study, the effects of different concentrations of bulk and nano-sized ag on seed germination and seedling growth of canola were investigated in a randomized completely design with four replications. the experimental treatments included four concentrations of bulk agno 3 (10, 100, 500 and 1000 ppm), four concentrations of nanosized ag (10, 100, 500 and 1000 ppm), and the control without ...
Serr variety to which all rootstocks were (!.raftedhas grown and produced on all rootstock selections although some have grown faster and produce more than others. Northern California Black Walnut (Juglans hindsii) and ~. major grow to moderate size and have good production potential. The paradox seedling, paradox cutting and Royal seedling grow to large size and have a good production potentia...
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