Evaluation of factors controlling net photosynthetic rate in Scots pine seedlings under field conditions without water stress

Oecologia ◽  
1981 ◽  
Vol 48 (2) ◽  
pp. 186-189 ◽  
Author(s):  
P. Hari ◽  
E. Hallman ◽  
R. Salminen ◽  
E. Vappavuori
Keyword(s):  
Water Stress ◽  
Net Photosynthetic Rate ◽  
Scots Pine ◽  
Photosynthetic Rate ◽  
Field Conditions ◽  
Pine Seedlings

Needle conductance and root egress of containerized Scots pine and Norway spruce seedlings after surface and deep planting

1987 ◽  
Vol 17 (8) ◽  
pp. 783-786 ◽  
Author(s):  
Karl-Anders Högberg
Keyword(s):  
Water Stress ◽  
Norway Spruce ◽  
Water Uptake ◽  
Scots Pine ◽  
Root Development ◽  
Water Loss ◽  
Early Stage ◽  
Evaporative Water ◽  
Soil Layers ◽  
Pine Seedlings

Surface planting and deep planting were compared with respect to water uptake and root development in the early stage of field establishment. The material consisted of containerized Scots pine (Pinussylvestris L.) and Norway spruce (Piceaabies (L.) Karst.) seedlings. For both species, surface planted seedlings showed less root egress 5 weeks after planting compared with deep planted. Needle conductance was lower for surface planted than deep planted pine seedlings. For pine seedlings high correlation was found between root egress and needle conductance 5 weeks after planting for surface planting but not for deep planting. It is concluded that surface planting increases the water stress risk during establishment. Evaporative water loss from the root ball and the upper soil layers is discussed as the main cause to this effect.

Effects of ozone and water stress on net photosynthetic rate of field grown soybean leaves

1988 ◽  
Vol 53 (1-4) ◽  
pp. 471-473 ◽  
Author(s):  
Steven F. Vozzo ◽  
Joseph E. Miller ◽  
Allen S. Heagle ◽  
Walter A. Pursley
Keyword(s):  
Water Stress ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Soybean Leaves

Scale of Physiological Processes Sensitivity to PEG-Induced Water Stress in Scots Pine Seedlings

2018 ◽  
Vol 65 (4) ◽  
pp. 532-540 ◽  
Author(s):  
Yu. V. Ivanov ◽  
I. E. Zlobin ◽  
A. V. Kartashov ◽  
P. P. Pashkovskiy ◽  
Vl. V. Kuznetsov
Keyword(s):  
Water Stress ◽  
Scots Pine ◽  
Physiological Processes ◽  
Pine Seedlings

The Effect of Water Stress on the Physiological Characters and Growth of Abelia grandiflora 'Francis Mason'

2014 ◽  
Vol 641-642 ◽  
pp. 1204-1208
Author(s):  
Hui Jiang ◽  
Fei Yong Liao ◽  
Qing Fang Xia ◽  
Yu Zhu
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Water Treatment ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Fluorescence Parameters ◽  
Effect Of Water ◽  
Dramatic Decline ◽  
Mild Drought ◽  
Physiological Characters

With the characteristics of great ornamental value and strong adaptability, Abelia grandiflora 'Francis Mason' is widely used in the garden. For the shortage of water in some garden and landscape spaces, the effect of water stress on the physiology of Abelia grandiflora 'Francis Mason' was tested to ascertain the optimum irrigation of it. The results showed that water flood suppressed the growth of the plants seriously after treated for 58 days, which embodied in the dramatic decline of Fv /Fm, Fv'/Fm', ETR, qP, chlorophyll and net photosynthetic rate. Treating with drought for 50 days was proved to be beneficial for the growth of the plants, for the Fv /Fm, Fv'/Fm', ETR, qP, chlorophyll were increased. But these fluorescence parameters were decreased 60 days later and the plants were dead in 90-days drought stress. Water treatment had the most significant impact on the plants whlie mild drought stress a little.

Effect of Water Stress on Photosynthetic Parameters of Soybean (Glycine max) and Velvetleaf (Abutilon theophrasti)

Weed Science ◽  
1987 ◽  
Vol 35 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Philip H. Munger ◽  
James M. Chandler ◽  
J. Tom Cothren
Keyword(s):  
Glycine Max ◽  
Water Stress ◽  
Stomatal Conductance ◽  
Water Potential ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Transpiration Rate ◽  
Abutilon Theophrasti ◽  
Leaf Water ◽  
Photosynthetic Parameters

Greenhouse experiments were conducted to elucidate the effects of water stress on photosynthetic parameters of soybean [Glycine max(L.) Merr. ‘Hutton′] and velvetleaf (Abutilon theophrastiMedik. # ABUTH). Stomatal conductance of both species responded curvilinearly to reductions in leaf water potential. At leaf water potentials less negative than −2.5 MPa, stomatal conductance, net photosynthetic rate, and transpiration rate were greater in velvetleaf than in soybean. Soybean photosynthetic rate was linearly related to stomatal conductance. Velvetleaf photosynthetic rate increased linearly with stomatal conductances up to 1.5 cm s–1; however, no increase in photosynthetic rate was observed at stomatal conductances greater than 1.5 cm s–1, indicating nonstomatal limitations to photosynthesis. As water stress intensified, stomatal conductance, photosynthetic rate, and transpiration of velvetleaf declined more rapidly than in soybean.

Evidence for nonstomatal inhibition of net photosynthesis in rapidly dehydrated shoots of Populus

1986 ◽  
Vol 16 (6) ◽  
pp. 1371-1375 ◽  
Author(s):  
G. Scarascia-Mugnozza ◽  
T. M. Hinckley ◽  
R. F. Stettler
Keyword(s):  
Water Stress ◽  
Stomatal Conductance ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Net Photosynthesis ◽  
Volume Shrinkage ◽  
Sharp Reduction ◽  
Stomatal Behaviour ◽  
Net Assimilation ◽  
Protoplast Volume

Results are presented on the decline of net photosynthesis during the application of rapid water stress to excised shoots of different Populus L. clones. Six clones were selected from the species Populustrichocarpa Torr. & Gray, Populusdeltoides Bartr., and from the hybrid Populustrichocarpa × Populusdeltoides, taking into account the differences in stomatal behaviour between and within these species. The two most productive P. trichocarpa clones and the hybrid clone, characterized by a reduced ability to close stomata during leaf desiccation, showed, nevertheless, a sharp reduction of net photosynthesis at water potentials lower than −1.5 MPa. In contrast, the inhibition of net assimilation in the P. deltoides clone, caused by water stress, was accompanied by a reduction in stomatal conductance. In all studied clones the decrease in net photosynthetic rate followed closely the point of turgor loss of the leaves, indicating a possible relationship between nonstomatal inhibition of photosynthesis and protoplast volume shrinkage.

Diurnal Variation of Instantaneous CO2 and H2O Gas-Exchange over Canopy and Leaf Level of Spring Maize in Arid Area

2013 ◽  
Vol 807-809 ◽  
pp. 1829-1838 ◽  
Author(s):  
Jia Xuan Guo ◽  
Xu Rong Mei ◽  
Yu Zhong Li
Keyword(s):  
Water Stress ◽  
Water Use Efficiency ◽  
Net Photosynthetic Rate ◽  
Water Use ◽  
Photosynthetic Rate ◽  
Arid Area ◽  
Theory And Practice ◽  
Filling Stage ◽  
Leaf Level ◽  
Use Efficiency

Information on the relationship between crop photosynthetic rate and water use efficiency at the leaf level and these at the canopy level is important on the study of theory and practice of high efficiency and water-saving agriculture. We simultaneous made instantaneous CO2 and H2O exchange rate, and instantaneous water use efficiency measurement at both leaf and canopy level in a rain-fed cropping system with spring corn during filling stage by Li-6400 infrared gas analysis meter and eddy correlation system. The results showed that in arid area water stress was the mainly factor influencing the net photosynthesis rate and water use efficiency. At the diurnal course, when soil relative moisture was about 40% at 0-100 cm soil layer, the maximum of net photosynthetic rate at leaf level occurred at about 10:00 under soil water stress, and at about 12:00 at canopy level on sunny days, the maximum leaf photosynthetic rate reached 1.3 mgm-2s-1 , almost close to those of irrigation corn at similar latitude area, and the maximum canopy assimilation rate were 0.9 mgm-2s-1 , reached 54.5% of those of irrigation corn at similar latitude area during filling stage, respectively;The maximum values of instantaneous water use efficiency at leaf and canopy level were 0.16 g (CO2)/ g (H2O) and 0.06 g (CO2)/ g (H2O), and ranged between 0.0055g (CO2)/ g (H2O) and 0.0123 g (CO2)/ g (H2O), 0.0113 g (CO2)/ g (H2O) and 0.0197 g (CO2)/ g (H2O) around noon, respectively. Instantaneous net photosynthetic rate and water use efficiency at leaf level were higher than those at canopy level after 10:00.

scholarly journals CONDUCTIVITY OF INTRACELLULAR ELECTROLYTES AS A QUICK INDICATOR OF THE VIABILITY OF SCOTS PINE SEEDLINGS AFTER WINTERING IN FIELD CONDITIONS

2019 ◽  
Vol LVI ◽  
pp. 7-21
Author(s):  
Jacek Banach ◽  
◽  
Kinga Skrzyszewska ◽  
Maria Novokreshchenova ◽  
Marta Kempf ◽  
...  
Keyword(s):  
Scots Pine ◽  
Field Conditions ◽  
Intracellular Electrolytes ◽  
Pine Seedlings

The Effect of Water Stress on the Physiology of Vinca major 'Variegata'

2013 ◽  
Vol 409-410 ◽  
pp. 782-787 ◽  
Author(s):  
Fei Yong Liao ◽  
Ying Xie ◽  
Hui Jiang
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Plant Growth ◽  
Water Content ◽  
Net Photosynthetic Rate ◽  
Photosynthetic Rate ◽  
Irrigation Water ◽  
Robinia Pseudoacacia ◽  
Effect Of Water ◽  
Vinca Major

The effects of water stress on the two year old Vinca majorVariegata were tested for proving the irrigation guidance for its application in the garden. The results showed that the water flood and the drought stress suppressed the plant growth. After treated with flooding for 13days, the qP, ETR, Fv'/Fm' and net photosynthetic rate were decreased, but the qN were increased and the plants were dead. The mid drought stress (the water content of soil were between 20 percent and 30 percent) slightly affected the growth of plant, which embodies in the slight decline of chlorophyll, qP, ETR, Fv'/Fm', Fv/Fm and qP, the ascend of net photosynthetic rate. Drought Stress badly affected the growth of plant, which embodies in the decline of chlorophyll, qP, ETR, Fv'/Fm', Fv/Fm, qP and net photosynthetic rate. The best irrigation for plant was the water content of soil between 20 percent and 30 percent, which does not affect the ornamental value of Robinia pseudoacacia and save the irrigation water. So the application of V. majorVariegata should avoid in the place for over 13 days water flood.

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