Search

Start Over Coverage 283-287

2. Photosynthesis, transpiration, and water use efficiency of two Puccinellia species on the Songnen grassland, northeastern China

Creator:
Wang, R. Z. and Yuan, Y. Q.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
intra- and inter-specific variations, leaf age, net photosynthetic rate, and plant and water relations
Language:
Multiple languages
Description:
The intra- and inter-specific variations in net photosynthetic (PN) and transpiration (E) rates and water use efficiency (WUE) of Puccinellia tenuiflora and Puccinellia chinampoensis leaves were compared. The two species experienced a similar habitat, but differed in leaf area, leaf colour, and nitrogen contents. Leaf PN and E for both reproductive and vegetative shoots of the two species declined with leaf age. PN for reproductive shoots was less than for vegetative shoots, but their E was greater than that of vegetative shoots in the dry season. The average PN and E for reproductive shoots of P. tenuiflora were lower than those of P. chinampoensis, but higher for vegetative shoots. and R. Z. Wang, Y. Q. Yuan.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Retention and allocation of 14C assimilates by maintenance leaves and harvest index of tea (Camellia sinensis L.)

Creator:
Barman, T. S. and Saikia, J K.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
clone differences, roots, shoot, and translocation
Language:
Multiple languages
Description:
Partitioning of 14C-labelled photosynthates to various parts of un-pruned tea clones TV1 and TV25 was assessed in vivo by exposing maintenance leaves to 14CO2 at monthly intervals throughout the year. The plants from shoot apex to root tip were divided into twelve components to assess the allocation and retention of 14C-photosynthates by the maintenance foliage. Out of the total photosynthates produced by the maintenance leaves, only 11.08 % was allocated to the commercially useful harvestable two and a bud shoots which is accepted as the harvest index of tea. The photosynthetically active maintenance leaves retained 19.05 % while 24.56 % was distributed to the branches. The bottom and the top parts of the trunk utilized 7.44 and 7.21 %, respectively. The thick roots at the base of the trunk, medium sized roots, pencil size roots, and feeder roots imported 7.28, 7.72, 7.65, and 8.01 % of 14C assimilates, respectively. Except retention by leaves, all the plant parts of vigorous clone TV25 required higher percentage of assimilates than TV1. The mean quantities of net photosynthates utilized by the stem and the roots were 69.37 and 30.63 %, respectively. and T. S. Barman, J. K. Saikia.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Štefan Šáro (10. 12. 1933 - 28. 5. 2013): osobnosť slovenskej jadrovej fyziky

Creator:
Antalic, Stanislav, Holý, Karol, and Povinec, Pavel
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
Šáro, Štefan, 1933-2013, jaderní fyzici, jaderná fyzika, nuclear physicists, nuclear physics, Slovensko, Slovakia, 6, and 53
Language:
Czech
Description:
Stanislav Antalic, Karol Holý, Pavel Povinec. and Obsahuje bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public