Chloroplastid pigment contents and chlorophyll a fluorescence in Amazonian tropical three species
نویسندگان
چکیده
منابع مشابه
Differences in pigment composition, photosynthetic rates and chlorophyll fluorescence images of sun and shade leaves of four tree species.
The differential pigment composition and photosynthetic activity of sun and shade leaves of deciduous (Acer pseudoplatanus, Fagus sylvatica, Tilia cordata) and coniferous (Abies alba) trees was comparatively determined by studying the photosynthetic rates via CO(2) measurements and also by imaging the Chl fluorescence decrease ratio (R(Fd)), which is an in vivo indicator of the net CO(2) assimi...
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Leaf chlorophyll fluorescence parameters as well as chlorophyll content were compared in three dominant mangrove species grown in two zones with different salinity in the Bhitarakanika National Park. The accumulation of dry matter and chlorophyll content in leaves decreased under high saline conditions. Quantification and de-convolution of chlorophyll fluo-rescence transient into several phenom...
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Tonnage (T), Simmonds (S) avocado trees, and TxS crosses were evaluated for differences in chlorophyll content and maximal quantum yield of photosystem II in sun and shade-type leaves. Total chlorophyll content by area (Chl a+bar) ranged from 984 mg m in TxS240 to 4320 mg m in Simmonds. Chlorophyll a/b ratio (Chl a/b) ranged from 9.8 to 5.5 in TxS238 and TxS243, respectively. Tonnage and Simmon...
متن کاملChlorophyll Fluorescence Data Reveals Climate-Related Photosynthesis Seasonality in Amazonian Forests
Amazonia is the world largest tropical forest, playing a key role in the global carbon cycle. Thus, understanding climate controls of photosynthetic activity in this region is critical. The establishment of the relationship between photosynthetic activity and climate has been controversial when based on conventional remote sensing-derived indices. Here, we use nine years of solar-induced chloro...
متن کاملTime-dependent quenching of chlorophyll a fluorescence from (pigment) system II by (pigment) system I of photosynthesis in Chlorella.
The quenching of System Ii fluorescence bv System I light was discovered in 196o (ref. I) and was later investigated in detail 2-~. DUYSENS AND SWEEI~S a suggested that System II reduces a compound "Q" , and System I oxidizes this reduced Q back to its oxidized form. The Q in the oxidized, but not in the reduced, form is a quencher of fluorescence. We have measured the time dependence of this q...
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ژورنال
عنوان ژورنال: Revista Árvore
سال: 2007
ISSN: 0100-6762
DOI: 10.1590/s0100-67622007000500020