the effect of automobile pollution was determined on chlorophyll content of four different tree species viz. azadirachta indica l., conocarpus erectus l., guiacum officinale l.and eucalyptus sp. growing along the roads of the city.  significant changes in the level of chlorophyll “a”, chlorophyll “b” and total chlorophyll “a+b” were found in the leaves of four tree species (a. indica, c. erectu...

The aim was to determine chlorophyll content index (CCI) and leaf chlorophyll (Chl a) content of a rush, Juncus roemerianus, a grass Spartina alterniflora, and a tree, Rhizophora mangle, occurring in coastal wetlands. Mean CCI values were 11.98 in J. roemerianus, 29.87 in S. alterniflora, and 30.68 in R. mangle. Mean chlorophyll content was 8.85 μg/cm in J. roemerianus, 9.72 μg/cm in S. alterni...

We conducted two experiments to determine the usefulness of a chlorophyll content meter (CCM) for the measurement of foliar chlorophyll concentration in sugar maple (Acer saccharum Marsh.) in the fall color period. In Experiment 1, four sugar maple trees were visually assigned to each of four fall foliage color categories in October 1998. On four dates in the fall of 1999, leaves were taken fro...

A field imaging spectrometer system (FISS; 380-870 nm and 344 bands) was designed for agriculture applications. In this study, FISS was used to gather spectral information from soybean leaves. The chlorophyll content was retrieved using a multiple linear regression (MLR), partial least squares (PLS) regression and support vector machine (SVM) regression. Our objective was to verify the performa...

The aim of this work was to study the allelopathic effect of 3 extracts viz 3%,5% and 10% prepared from leaves of GM (insect resistance) and non GM maize on physiology of succeeding crop wheat (Triticum aestivum L.). The extracts prepared from GM maize significantly decreased chlorophyll a content but significantly increased chlorophyll b content as compared with untreated control. Content of c...

The 2004 Harvest Survey of Canadian canola (1) had higher than average chlorophyll content due to a cooler than normal season combined with an early damaging frost resulting in immature seed. As a result, chlorophyll levels in many No. 1 Canada Canola (1CC) export shipments increased to over 30 mg/kg (2). Dockage has been suspected in contributing to the chlorophyll levels in canola cargoes but...

in order to study the effect of iron chelate (fe-eddha) on some biochemical characteristic of safflower (carthamus tinctorius l.) under two irrigation regimes, a field experiment was set up a split-plot based on randomized block design with four replication in 2011 in a research field of the faculty of agriculture at shahed university. in this study the main plots consisted of two levels of irr...

The preceding paper (2) has described some of the changes that occur in the photosynthetic activity of the mutant strain y-2 of the unicellular green alga Chlamydomonas reinhardi accompanying changes in chlorophyll content. These results indicated that photosynthetic activity might be regulated by a mechanism which is related to either a critical chlorophyll content or structural configuration ...

We present an empirical application of multispectral laser scanning for monitoring the seasonal and spatial changes in pine chlorophyll (a+ b) content and upscaling the accurate leaf-level chlorophyll measurements into branch and tree level. The results show the capability of the new instrument for monitoring the changes in the shape and physiology of tree canopy: the spectral indices retrieved...