Effects of Elevated Carbon Dioxide, Water, and Nutrients on Photosynthesis, Stomatal Conductance, and Total Chlorophyll Content of Young Loblolly Pine (Pinus taeda L.) Trees

1998 ◽  
pp. 169-184 ◽  
Author(s):  
Thomas C. Hennessey ◽  
Venkatesh K. Harinath
Keyword(s):  
Carbon Dioxide ◽  
Stomatal Conductance ◽  
Chlorophyll Content ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Elevated Carbon Dioxide ◽  
Total Chlorophyll ◽  
Total Chlorophyll Content ◽  
Pinus Taeda L

Elevated carbon dioxide does not affect average canopy stomatal conductance of Pinus taeda L.

Oecologia ◽  
1998 ◽  
Vol 117 (1-2) ◽  
pp. 47-52 ◽  
Author(s):  
Diane E. Pataki ◽  
Ram Oren ◽  
David T. Tissue
Keyword(s):  
Carbon Dioxide ◽  
Stomatal Conductance ◽  
Pinus Taeda ◽  
Elevated Carbon Dioxide ◽  
Canopy Stomatal Conductance ◽  
Pinus Taeda L

scholarly journals Effect of different chemical and seasons on gas exchange parameters, phytohormones, and chlorophyll content in tissue culture plants of Pomegranate (Punica granatum L.) cv. Bhagwa

2021 ◽  
Vol 22 (1&2) ◽  
pp. 127-135
Author(s):  
Firoz S. ◽  
B.N.S. Murthy ◽  
M.L.N. Reddy ◽  
K. K. Upreti ◽  
J. Satisha ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Chlorophyll Content ◽  
Fruit Set ◽  
Foliar Spray ◽  
Total Chlorophyll ◽  
Flowering Stage ◽  
Endogenous Iaa ◽  
Total Chlorophyll Content ◽  
Intrinsic Water Use Efficiency ◽  
Rate Of Photosynthesis

Little is known about rate of photosynthesis, transpiration, stomatal conductance, intrinsic water use efficiency, endogenous phytohormones (Gibberellic acid and Indole acetic acid) concomitant with leaf chlorophyll content during flowering and fruiting stages in pomegranate. As a result, a study was conducted to determine the function of various chemicals, such as Nitrobenzene (NB) at 1.0, 1.5, and 2.0 ml plant-1, Cycocel (CCC) at 500, 1000, and 1500 ppm plant-1, Uracil 25 and 50 ppm plant-1, CCC1000 ppm + Uracil 25 ppm plant-1, CCC 1500 ppm + Uracil 50 ppm plant-1, along with control at ICAR - Indian Institute of Horticultural Research (IIHR), Bengaluru, during the flowering and fruit set stages during two seasons, namely ambe bahar (January–February 2016) and hastha bahar (September–October 2016-17). Applications of Uracil 50 ppm plant-1, Uracil 25 ppm plant-1 and nitrobenzene 1.5 ml plant-1 at flowering stage resulted in highest rate of photosynthesis (16.48 µmol m-2 s-1), transpiration (7.69 mmol m-2 s-1) and stomatal conductance (0.44 mol m-2 s-1). Foliar spray of  Nitrobenzene 1.5 ml plant-1, cycocel 1000 ppm plant-1 + Uracil 25 ppm plant-1 in conjunction with application of nitrobenzene 1.0 ml plant-1 registered highest rate of photosynthesis (12.55 µmol m-2 s-1), transpiration (6.19 mmol m-2 s-1) and stomatal conductance (0.19 mol m-2 s-1) at fruit set stage. Application of Uracil 50 ppm plant-1 resulted in higher levels of endogenous IAA content (394.3 ng g-1 FW and 885.3 ng g-1 FW), lower levels of GA3 content (110.7 ng g-1 FW and 144.0 ng g-1 FW), and highest total chlorophyll content (3.14 mg g-1 and 1.99 mg g-1) in the leaves at both flowering and fruit set stages. With application of cycocel 1500 ppm plant-1 at flowering and fruit set stages, highest photosynthetic rate (17.67 µmol m-2 s-1 and 15.71 µmol m-2 s-1), transpiration rate (7.68 mmol m-2 s-1 and 6.13 mmol m-2 s-1) and higher levels of endogenous IAA (946.7 ng g-1 FW and 633.0 ng g-1 FW) were registered respectively. Following application of cycocel 1500 ppm plant-1 and 500 ppm plant?1 at both flowering and fruit set stages, lower endogenous GA3 (163.3 ng g-1 FW and 276.0 ng g-1 FW) were observed. At flowering stage, cycocel 1000 ppm plant-1 + Uracil 25 ppm plant-1 recorded the highest total chlorophyll content (2.35 mg g-1). During flowering period, cycocel 1500 ppm plant-1 application resulted in the highest stomatal conductance (0.57 mol m-2 s-1). Application of cycocel 1500 ppm plant-1 + Uracil 50 ppm plant-1 resulted in the highest stomatal conductance (0.38 mol m-2 s-1) at fruit set stage.  

Effects of nitrogen supply and elevated carbon dioxide on construction cost in leaves of Pinus taeda (L.) seedlings

Oecologia ◽  
1993 ◽  
Vol 95 (4) ◽  
pp. 575-580 ◽  
Author(s):  
Kevin L. Griffin ◽  
Richard B. Thomas ◽  
Boyd R. Strain
Keyword(s):  
Carbon Dioxide ◽  
Pinus Taeda ◽  
Elevated Carbon Dioxide ◽  
Construction Cost ◽  
Nitrogen Supply ◽  
Pinus Taeda L

scholarly journals A Consensus Map for Loblolly Pine (Pinus taeda L.). I. Construction and Integration of Individual Linkage Maps From Two Outbred Three-Generation Pedigrees

Genetics ◽  
1999 ◽  
Vol 151 (1) ◽  
pp. 321-330 ◽  
Author(s):  
Mitchell M Sewell ◽  
Bradley K Sherman ◽  
David B Neale
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Fragment Length Polymorphism ◽  
Random Amplified Polymorphic Dna ◽  
Mapping Function ◽  
Genetic Maps ◽  
Linkage Data ◽  
Linkage Maps ◽  
Consensus Map ◽  
Pinus Taeda L

Abstract A consensus map for loblolly pine (Pinus taeda L.) was constructed from the integration of linkage data from two unrelated three-generation outbred pedigrees. The progeny segregation data from restriction fragment length polymorphism, random amplified polymorphic DNA, and isozyme genetic markers from each pedigree were recoded to reflect the two independent populations of parental meioses, and genetic maps were constructed to represent each parent. The rate of meiotic recombination was significantly greater for males than females, as was the average estimate of genome length for males {1983.7 cM [Kosambi mapping function (K)]} and females [1339.5 cM(K)]. The integration of individual maps allows for the synthesis of genetic information from independent sources onto a single consensus map and facilitates the consolidation of linkage groups to represent the chromosomes (n = 12) of loblolly pine. The resulting consensus map consists of 357 unique molecular markers and covers ∼1300 cM(K).

Long-term effects of stand density management and genotype on wood properties of loblolly pine (Pinus taeda L.) in the mid-South USA

2021 ◽  
Vol 491 ◽  
pp. 119176
Author(s):  
Michael A. Blazier ◽  
Thomas Hennessey ◽  
Laurence Schimleck ◽  
Scott Abbey ◽  
Ryan Holbrook ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Density ◽  
Wood Properties ◽  
Long Term Effects ◽  
Stand Density Management ◽  
Pinus Taeda L

scholarly journals Four Site-Preparation Techniques for Regenerating Pine-Hardwood Mixtures in the Piedmont

1997 ◽  
Vol 21 (3) ◽  
pp. 116-122 ◽  
Author(s):  
Thomas A. Waldrop
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Height Growth ◽  
Site Preparation ◽  
Site Conditions ◽  
Growing Seasons ◽  
Southern Appalachian ◽  
Medium Quality ◽  
Pinus Taeda L ◽  
Preparation Techniques

Abstract Four variations of the fell-and-burn technique, a system developed to produce mixed pine-hardwood stands in the Southern Appalachian Mountains, were compared in the Piedmont region. All variations of this technique successfully improved the commercial value of low-quality hardwood stands by introducing a pine component. After six growing seasons, loblolly pine (Pinus taeda L.) occupied the dominant crown position and oaks the codominant position in fell-and-burn treated stands on poor to medium quality sites. The precise timing of felling residual stems, as prescribed by the fell-and-burn technique, may be flexible because winter and spring felling produced similar results. Although summer site preparation burns reduced hardwood height growth by reducing the length of the first growing season, they did not improve pine survival or growth. Pines were as tall as hardwoods within four growing seasons in burned plots and within six growing seasons in unburned plots. Additional research is needed to determine the level or intensity of site preparation needed to establish pine-hardwood mixtures over a range of site conditions. South. J. Appl. For. 21(3):116-122.

scholarly journals Genotypic Stability Effects on Predicted Family Responses to Silvicultural Treatments in Loblolly Pine

1997 ◽  
Vol 21 (2) ◽  
pp. 84-89 ◽  
Author(s):  
Steven E. McKeand ◽  
Robert P. Crook ◽  
H. Lee Allen
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Growth Responses ◽  
Intensive Culture ◽  
Genotype By Environment ◽  
Silvicultural Treatments ◽  
Genotypic Stability ◽  
Superior Genotypes ◽  
Using Data ◽  
Pinus Taeda L

Abstract The lack of rank change in growth characteristics when open-pollinated families of loblolly pine (Pinus taeda L.) are planted on different sites in the Southeast has greatly simplified breeding for superior genotypes. Although family rank does not usually change, genotype by environment interactions (GxE) may be very important in operational deployment of families in regeneration programs. Using data from GxE trials and two site preparation-fertilization-herbicide trials, we estimated the growth that different families should achieve following application of these silvicultural practices. Better performing families tend to be most responsive to site changes (i.e. genetically unstable). Growth responses to silvicultural treatment will be overestimated if only the most responsive families are used in silvicultural research trials. Similarly, genetic gains will be overestimated if gain trials are planted on only the best sites or receive intensive culture. South. J. Appl. For. 21(2):84-89.

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