نتایج جستجو برای: leaf tip necrosis

تعداد نتایج: 214743  

Tip leakage loss introduces major part of losses of the rotor in axial gas turbines. Therefore, the rotor blade tip has a considerable effect on rotor efficiency. To understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). Various blade tip configurations s...

2015
J. William Allwood Surya Chandra Yun Xu Warwick B. Dunn Elon Correa Laura Hopkins Royston Goodacre Alyson K. Tobin Caroline G. Bowsher

The control and interaction between nitrogen and carbon assimilatory pathways is essential in both photosynthetic and non-photosynthetic tissue in order to support metabolic processes without compromising growth. Physiological differences between the basal and mature region of wheat (Triticum aestivum) primary leaves confirmed that there was a change from heterotrophic to autotrophic metabolism...

Journal: :Plant physiology 1978
U Schreiber

A chlorophyll fluorescence induction (Kautsky effect) assay predicted ozone-induced injury in bean leaves (Phaseolus vulgaris) at least 20 hours before any visible sign of leaf necrosis. The extent of injury, which could be predicted during exposure to ozone, depended on concentration, exposure time, and leaf development stage. Much more injury occurred in light than in darkness and long exposu...

2006
S. J. D.

FRYDA, S. J., and J. D. OTTA. 1978. Epiphytic movement and survival of Pseudomonas syringae on spring wheat. Phytopathology 68:1064-1067. Field, greenhouse, and growth chamber experiments seedlings at 10 C than at 16 or 22 C. In the field, with a demonstrated that Pseudomonas syringae, the incitant of serotype VI isolate as a marker, seedborne P. syringae was bacterial leaf necrosis of wheat, m...

2010
Woong Young Soh

The structure and leaf development of the shoot apical meristem in embryos and seedlings of Thuja orientalis L.were observed by using SEM,and the area of the shoot apical meristem was studied by an image analyzer.The shoot apex of embryos was of a round tip cone shape with flat sides;it was transformed into an inverted boat shape.In seedlings,the shoot apical meristem was of a convex-rectangula...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Olivier Michaud Anne-Sophie Fiorucci Ioannis Xenarios Christian Fankhauser

Competition for light triggers numerous developmental adaptations known as the "shade-avoidance syndrome" (SAS). Important molecular events underlying specific SAS responses have been identified. However, in natural environments light is often heterogeneous, and it is currently unknown how shading affecting part of a plant leads to local responses. To study this question, we analyzed upwards le...

Bahram Rasoulian, Hassan Ahmadvand, Houshang Rafighdoost, Leila Jafari pour, Majid Tavafi, Marzyeh Rashidi Pour, Mona Mahmodi,

Introduction: Renal Ischemia Reperfusion is considered to be one of the causes of acute renal failure (AKI). In addition, renal ischemia is an important incident usually occurs due to renal transplantion, repair of suprarenal aneurysm, hemorrhagic shock. A recent study reported that reactive oxygen species (ROS) are important mediators of AKI. It seems essential to use antioxidant to decrease t...

2017
Doug P. Aubrey Stephen W. Fraedrich Thomas C. Harrington Rabiu Olatinwo

We report the association of Cristulariella moricola (Hino) Redhead with a zonate leaf spot on Eucalyptus benthamii (Myrtaceae). We observed the disease outbreak across a series of experimental E. benthamii plantings in Barnwell County, South Carolina, USA in October 2015. The disease caused nearly complete foliar necrosis of most trees in one experimental planting, but disease incidence remain...

2007
Fabio C. Chaves Thomas J. Gianfagna

Moniliophthora perniciosa infects young meristematic tissue of Theobroma cacao and induces abnormal shoot development and ultimately necrosis. We analyzed culture filtrates of M. perniciosa to identify metabolites with possible effects on witches’ broom disease symptom development. All isolates produced salicylic acid (SA), phenyllactic acid and mandelic acid. When SA levels were measured in pl...

Journal: :Frontiers in Ecology and Evolution 2021

Due to both anthropogenic and natural causes, the number of Horsfieldia hainanensis has been decreasing each year in Tongza Branch nursery (109.534 525°E, 18.763 516°N) Hainan Academy Forestry, China. Consequently, protection H. is urgent, as that most rare tree species. To develop a more comprehensive understanding growth environment, we took 3-year-old saplings research object. We controlled ...

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