The relationship between photosynthesis and respiration.

parameters on both photosynthesis and stomatal.How does xylem affect photosynthesis?

-Closing stomata in response to abscisic acid (ABA)(a plant hormone)

As A shows, there were significant differences among substitution lines for yield in both stress and non-stress conditions. The chromosomes of 'A' and 'B' genome had the lowest and the highest yield as compared to the other two groups both in stress and non-stress conditions, respectively. Probably the genome 'B' of ‘Timstein' cultivar had drought tolerance genes. Therefore, the role of group 'B' in increasing yield was more prominent than the other two groups. Significant differences were found among substitution lines regarding Pr and gs in stress condition (see ). The chromosomes of group 'A' had fewer Pr and gs than two other groups both in stress and non-stress conditions (B and C). Therefore, the role of group 'B and D' in increasing those traits was more prominent than 'A' genome. There was not strong but significant correlation between yield with Pr and gs both in stress and non-stress condition. Maghsoudi and Maghsoudi moud (2008) found those stomatal characteristics are poorly correlated with grain yield and transpiration in some drought tolerant wheat cultivars. 1A, 5A, 2B, 3B, 4B, 7B, and 5D substitution lines as well as 1A, 3A, 2B, 3B, 6B, 7B, 1D, 5D, and 6D lines in terms of seed yield were significantly different from recipient parent in stress and non-stress condition, respectively. 3A, 2B, 3B, 4B, and 3D in stress condition for photosynthetic rate, 3A, 2B, 3B, 4B, and 1D lines, 1A, 3B, 1D, 6D, and 7D lines regarding gs were significantly different from 'Chinese Spring' in stress and non-stress conditions, respectively. Most of the substitution lines except 1A, 3A, 7A, 2B, 3B, 1D, and 5D had lower gs in stress condition. These differences in gs in stress and non-stress condition may be due to the degree of opening or length of time that the stomata are open and also to transpiration rate. Generally, substitution lines of 3A, 2B, 3B, 4B and 6D were the most prominent lines of all for most of the studied traits. Therefore, they must have yield effective genes that by changing stomatal size and frequency affect yield, Pr, and gs. The results of this experiment showed that the role of the chromosomes of group 'B' was more prominent than the other two groups as for stomatal characteristics. However, these results show that stomatal characteristics are not strongly correlated with grain yield, Pr and gs as with many other morpho-physiological characteristics. Stomatal features are not in close relation with yield. This may be due to polygenic nature of yield efforts.

-Need to open stomata to spongy mesophyll to exchange air in spongy mesophyll

Stomatal opening and closing in Commelina communis

Introduction: "Photosynthesis is the conversion of light energy to chemical energy that is stored in glucose or other organic compounds; it occurs in plants, algae, and certain prokaryotes" (Campbell, G-16).

and as their tugidity increases so the stomatal.what is the role of stomata in photosynthesis?

Substitution lines are promising genetic stocks for studying the role of chromosomes in controlling quantitative traits including drought tolerance related traits and they are widely used for studying inheritance of quantitative traits in wheat (Law et al. 1978 a, Law et al. 1978b). The aims of this study were to analyze the relationship between stomatal characteristics, yield, photosynthetic rate and stomatal conductance, and to locate the genes controlling those traits.

Other stomatal responses.The Crucial Role of Stomata in Plant Transpiration and Photosynthesis.

Measuring Stomatal Density - Science and Plants for …

For photosynthesis to occur, plants need: · Light energy from the sun · Chlorophyll to absorb light energy · Carbon dioxide from the atmosphere and from respiration in plant cells · Water which is absorbed by the roots and transported to the leaves by the xylem tubes....

Photosynthetic and stomatal responses of Larix …

Matos JL and Bergmann DC (2014) Convergence of stem cell behaviors and genetic regulation between animals and plants: insights from the Arabidopsis thaliana stomatal lineage. F1000Prime Reports 6: 53.

Photosynthesis and stomatal conductance of potato …

Merilo E , Laanemets K , Hu H , et al. (2013) PYR/RCAR receptors contribute to ozone‐, reduced air humidity‐, darkness‐, and CO2‐induced stomatal regulation. Plant Physiology 162: 1652–1668.

Photosynthesis and Stomatal Light Responses in Snap …

The Effects of Elevated Carbon Dioxide Levels on the Transpiratoin Rates of Zonal Geranium PlantsHow Does the Introduction of NaF Affect the Rate of Photosynthesis in Isolated Chloroplasts?

Measuring Stomatal Density - Science and Plants for Schools

Laporte MM, Shen B, Tarczynski C. 2002. Engineering for drought avoidance: expression of maize NADP–malic enzyme in tobacco results in altered stomatal function. Journal of Experimental Botany. 53: 699–705.