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Start Over Creator Rama Das, V. S.

1. A Himalayan monsoonal location exhibiting unusually high preponderance of C4 grasses

Creator:
Rama Das, V. S. and Vats, S. K.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
An unexpectedly large proportion of C4 grasses was found in a moderately temperate and moist Himalayan location during monsoon period. 79 % of total grasses occurring in the area were found to be C4. Several grasses hitberto unreported as C4 háve now been recorded. The principál cause for the natural abundance of C4 species is presumably low atmospheric CO2 levels rallua' tlian the aridity and warmer temperatures. The finding adds a new dimension to our knowledge of natural distribution of the C4 species.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Differential photosynthetic acclimation pattern to limiting growth-irradiance in two types of C4 plants

Creator:
Sailaja, M. V. and Rama Das, V. S.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
chlorophyll amount and fluorescence, cytochrome b6/f, electron transport rates, net photosynthetic rate, photosystems 1 and 2, and quantum efficiency of photosystem 2
Language:
Multiple languages
Description:
Photosynthetic acclimation to reduced growth irradiances (650 and 200 µmol m-2 s-1) in Eleusine coracana (L.) Garten, a nicotinamide adenine dinucleotide-malic enzyme (NAD-ME) C4 species and Gomphrena globosa L., a nicotinamide adenine dinucleotide phosphate-malic enzyme (NADP-ME) C4 species were investigated. E. coracana plants acclimated in 4 and 8 d to 650 and 200 µmol m-2 s-1, respectively, whereas G. globosa plants took 8 and 10 d, respectively, to acclimate to the same irradiances. The acclimation to reduced irradiance was achieved in both species by greater partitioning of chlorophyll towards the light-harvesting antennae at the expense of functional components. However, magnitude of increase in the light-harvesting antenna was higher in E. coracana as compared to G. globosa. Superior photosynthetic acclimation to reduced irradiance in G. globosa was due to the smaller change in functions of the cytochrome b 6/f complex, photosystem (PS) 1 and PS2 leading to the higher carbon fixation rates compared to E. coracana. and M. V. Sailaja, V. S. Rama Das.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public