Photosynthetic characteristics of Hordeum, Triticum, Rumex, and Trifolium species at contrasting altitudes
IR@IHBT: CSIR-Institute of Himalayan Bioresource Technology, Palampur
View Archive Info| Field | Value | |
| Title |
Photosynthetic characteristics of Hordeum, Triticum, Rumex, and Trifolium
species at contrasting altitudes
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| Creator |
Kumar, Neeraj
Kumar, Sanjay Ahuja, Paramvir Singh |
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| Subject |
Plant sciences
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| Description |
Photosynthetic characteristics were compared between plants of low altitude (LA) grown at LA (Palampur; 1 300 m) and
at high altitude, HA (Kibber; 4 200 m), and plants naturally occurring at different altitudes (Palampur, 1 300 m; Palchan,
2 250 m; and Marhi, 3 250 m). Net photosynthetic rate (PN) was not significantly different between altitudes. However,
the slopes of the curve relating PN to intercellular CO2 concentration (Ci) were higher in plants at Palchan, Marhi, and
Kibber compared to those at Palampur, indicating that plants had higher efficiency of carbon uptake (the initial slope of
PN/Ci curve is an indication) at HA. They had also higher stomatal conductance (gs), transpiration rate, and lower water
use efficiency at HA. gs was insensitive to photosynthetic photon flux density (PPFD) for plants naturally occurring at
Palampur, Palchan, and Marhi, whereas plants from LA grown at Palampur and Kibber responded linearly to increasing
PPFD. Insensitivity of gs to PPFD could be one of the adaptive features allowing wider altitudinal distribution of the
plants.
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://ihbt.csircentral.net/238/1/photo2.pdf
Kumar, Neeraj and Kumar, Sanjay and Ahuja, Paramvir Singh (2005) Photosynthetic characteristics of Hordeum, Triticum, Rumex, and Trifolium species at contrasting altitudes. Photosynthetica, 43 (2). pp. 195-201. |
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| Relation |
http://ihbt.csircentral.net/238/
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