The seasonal regulation of gas exchange and water relations of field grown macadamia

The effect of water stress on gas exchange, water relations and leaf anatomical characteristics have been studied in two olive cultivars (Olea europea, L. cv. ‘Koroneiki’ and cv. ‚Mastoidis’). Photosynthetic rate as well as stomatal conductance were decreased in stressed plants. Osmotic potential (π) declined rapidly in stressed plants indicating their ability for osmoregulation. Bulk modulus of elasticity (ε) was significantly higher in stressed compared to well irrigated plants. The volume fraction of intercellular spaces of the upper palisade parenchyma, the spongy parenchyma as well as the lower palisade parenchyma were significantly lower in stressed compared to well irrigated plants. On the other hand, the density of mesophyll cells in the upper palisade parenchyma, spongy parenchyma and lower palisade parenchyma increased significantly in stressed plants

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Biomass partition, leaf gas exchange and water relations of alfalfa and milkvetch seedlings in response to soil drying

Photosynthetica ◽

10.1007/s11099-010-0064-x ◽

2010 ◽

Vol 48 (4) ◽

pp. 481-487 ◽

Cited By ~ 7

Author(s):

B. C. Xu ◽

X. P. Deng ◽

S. Q. Zhang ◽

L. Shan

Keyword(s):

Gas Exchange ◽

Water Relations ◽

Leaf Gas Exchange ◽

Soil Drying ◽

Biomass Partition

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Responses to drought of five Brachiaria species. II. Water relations and leaf gas exchange

Plant and Soil ◽

10.1023/b:plso.0000016555.53797.58 ◽

2004 ◽

Vol 258 (1) ◽

pp. 249-260 ◽

Cited By ~ 16

Author(s):

Orlando Guenni ◽

Zdravko Baruch ◽

Douglas Marín

Keyword(s):

Gas Exchange ◽

Water Relations ◽

Leaf Gas Exchange

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Leaf Water Relations and Gas Exchange in Relation to Forage Production in Four Asiatic Bluestems 1

Crop Science ◽

10.2135/cropsci1982.0011183x002200050034x ◽

1982 ◽

Vol 22 (5) ◽

pp. 1036-1040 ◽

Cited By ~ 17

Author(s):

P. I. Coyne ◽

J. A. Bradford ◽

C. L. Dewald

Keyword(s):

Gas Exchange ◽

Water Relations ◽

Leaf Water ◽

Forage Production ◽

Leaf Water Relations

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Seed-source variation in water relations, gas exchange, and needle morphology of mature ponderosa pine trees

Canadian Journal of Forest Research ◽

10.1139/x93-098 ◽

1993 ◽

Vol 23 (4) ◽

pp. 749-755 ◽

Cited By ~ 11

Author(s):

Bert M. Cregg

Keyword(s):

Gas Exchange ◽

South Dakota ◽

Leaf Area ◽

Water Relations ◽

Specific Leaf Area ◽

Ponderosa Pine ◽

Stomatal Density ◽

The Other ◽

Seed Sources ◽

Needle Morphology

Xylem pressure potential (ψx), net photosynthesis (A), needle conductance (gn), and transpiration (E) were measured periodically throughout the 1991 growing season on 16 ponderosa pine (Pinusponderosa Dougl. ex Laws.) trees growing in a 23-year-old provenance planting in eastern Nebraska. The trees studied were from four diverse sources: western Montana, northwest South Dakota, southern New Mexico, and central Arizona. In addition to water relations and gas exchange, specific leaf area, stomatal density, and surface to volume ratios were determined on 1-year-old foliage of each tree. Compared with the other seed sources, gas exchange of the South Dakota source was lowest early in the summer, when ψx was generally high, and highest in the late summer, when ψx declined. However, the relation of gn to ψx did not appear to differ among the seed sources. The South Dakota source had lower stomatal density and needle length than the other sources tested. No differences in specific leaf area or surface to volume ratio were observed. Overall, variation in physiology and needle morphology among seed sources of mature ponderosa pine appears to be more subtle than intraspecific variation of seedlings of other species reported in the literature.

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