geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition


, : Leaf gas exchange and competitive ability of Zea mays and Sorghum halepense as affected by water competition.

In an environment involving water deficit and competition, weed species may show inefficient water use. The aim was to determine the water consumption strategy of Zea mays and Sorghum halepense and the effects of these strategies on crop and weed competitive ability.Under two soil water availability conditions, the soil and leaf water potential (?l), relative water content (RWC) and leaf gas exchange parameters were measured during the critical period of crop competition in pot experiments where Z. mays and S. halepense were grown alone or in competition. In addition, the relative yield total and aggressivity index of both species were calculated.S. halepense showed continuous absorption of water, reaching a lower ?l than the Z. mays hybrids. S. halepense maintained a RWC of above 90%, which only decreased to 70% in the case of competition for low water supplies. In Z. mays, RWC declined to values of 70% at both water levels. S. halepense exhibited active leaf gas exchange. Z. mays hybrids had lower competitive ability than S. halepense at both competition levels due to their conservative water use strategy. Sustained water use by the weed could be the cause of the increased aggressivity of S. halepense under water deficit conditions.

US$29.90


Other references

Anonymous, 1980: Thirty-sixth Annual Meeting of the American Academy of Allergy, Atlanta, Georgia, February 16-20, 1980. Abstracts of papers. Journal of Allergy and Clinical Immunology 65(3): 163-237

Brinton, E.A.; Kashyap, M.L.; Vo, A.N.; Thakkar, R.B.; Jiang, P.; Padley, R.J., 2011: Niacin extended-release therapy in phase III clinical trials is associated with relatively low rates of drug discontinuation due to flushing and treatment-related adverse events: a pooled analysis. Niacin is a highly effective agent for increasing low high-density lipoprotein cholesterol (HDL-C) levels. It also has beneficial effects on key pro-atherogenic lipoprotein parameters. However, the side effect of flushing can challenge patient adh...

Anonymous, 1997: Cosmetic gum grafting. Journal of the American Dental Association 128(11): 1500-1500

Parker, B.; Rajapakshe, R.; Moldovan, A.; Araujo, C.; Crook, J., 2015: An Internet-Based Means of Monitoring Quality of Life in Post-Prostate Radiation Treatment: A Prospective Cohort Study. Widespread integration of the Internet has resulted in an increase in the feasibility of using Web-based technologies as a means of communicating with patients. It may be possible to develop secure and standardized systems that facilitate Internet...

Blattny, C.; Novak, S., 1946: Reports of the experiments on the determination of districts suitable for seed potatoes in Bohemia. 100 tubers of healthy stock of Kerovsky Erstling were planted in various parts of Bohemia during 1939-1941 and as infectors of of rugose mosaic 4 tubers of diseased stock were planted in each plot at random. All plots were under observation and in...

Etzel, Vollrad., 1995: Geschlossene Gesellschaft - wie in der Natur, so im Aquarium. DKG Journal. August; 275: 75-78

Krzyzak, A.Tadeusz.; Klodowski, K., 2016: The b matrix calculation using the anisotropic phantoms for DWI and DTI experiments. B-matrix Spatial Distribution Diffusion Tensor Imaging (BSD-DTI) is a novel approach to imaging of the diffusion tensor. By means of the method a spatial distribution of the b matrices is determined and subsequently incorporated into diffusion ten...

Lee, C.Gon.; Lee, B.; Lee, J.; Lee, M., 2015: The natural course of clinically isolated syndrome in pediatric patients. The first episode of central nervous system (CNS) symptoms with a presumed inflammatory demyelinating cause is defined as clinically isolated syndrome (CIS) according to the 2007 consensus of the International Pediatric Multiple Sclerosis Study Gr...

Bouche, J.; Frèche, C.; Chaix, G.; Hannequin, M., 1969: Indications, technics and results of continued drainage in otitis serosa. Annales D'oto-Laryngologie et de Chirurgie Cervico Faciale 86(7): 453-455

Stehli Francis G., 1973: Review of Paleoclimate and Continental Drift. State of the art, oxygen isotopes, paleotemperatures, paleobiogeography, paleomagnetism, sediment data.