Estimation of total nitrogen content in sugar beet leaves based on chlorophyll fluorescence parameters
نویسندگان
چکیده
منابع مشابه
effects of methanol application on sugar beet (beta vulgaris) relative water content, chlorophyll content and chlorophyll fluorescence parameters under drought stress conditions
to evaluate the effects of methanol and drought stress on chlorophyll fluorescence parameters, chlorophyll and relative water content in sugar beet, a study was conducted in 2008 in maahdasht (karaj, iran). aqueous solutions of 0 (control), 7, 14, 21, 28, 35% (v/v) methanol with each solution containing 0.2% glycine and a second factor, namely drought stress (irrigation after 70% depletion of a...
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The response of sugar beet (Beta vulgaris L.) leaves to iron deficiency can be described as consisting of two phases. In the first phase, leaves may lose a large part of their chlorophyll while maintaining a roughly constant efficiency of photosystem II photochemistry; ratios of variable to maximum fluorescence decreased by only 6%, and photon yields of oxygen evolution decreased by 30% when ch...
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Sugar beet (Beta vulgaris cv. Loretta) and rape (Brassica napus cv. Licolly) plants were exposed under equal dose conditions in closed fumigation chambers under two different ozone (O3) pattern: Var130 (17:00–09:00 h: 40 μg O3 m −3; 09:00–17:00 h: 130μg O3 m−3) and Var220 (16:0012:00 h: 40 μg O3 m −3; 12:00–16:00 h: 220μg O3 m−3). Control plants were exposed under carbon filtered air conditions...
متن کاملSugar transport in conducting elements of sugar beet leaves.
Autoradiography was used to determine the distribution of labeled sugar in conducting elements of the blade and petiole of sugar beet leaves at intervals ranging from 5 sec to 24 hr. The processes of assimilation by the green cells, collection of sugar in the minor veins and export in phloem elements were demonstrated visually. It appears that in minor veins sugar is translocated in companion c...
متن کاملFluorescence Indices for the Proximal Sensing of Powdery Mildew, Nitrogen Supply and Water Deficit in Sugar Beet Leaves
Using potted sugar beet plants we aimed to investigate the suitability of four fluorescence indices to detect and differentiate the impact of nitrogen supply, water deficit and powdery mildew in two sugar beet cultivars (Beta vulgaris L.). Plants were grown inside a polytunnel under two nitrogen levels combined with water deficit or full irrigation. Changes in plant physiology were recorded at ...
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ژورنال
عنوان ژورنال: Photosynthetica
سال: 2020
ISSN: 0300-3604,1573-9058
DOI: 10.32615/ps.2020.036