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Canopy leaf area development and age-class dynamics in cotton


, : Canopy leaf area development and age-class dynamics in cotton. Crop science 32(2): 451-456

Leaf senescence contributes to reduced canopy photosynthesis when new leaf initiation cannot compensate for increased leaf aging after canopy closure. However, since leaf aging is seldom addressed in wholeplant investigations, it is difficult to evaluate how age-class composition influences crop productivity. Field studies were conducted to examine leaf area development in cotton (Gossypium hirsutum L.) and to incorporate this information into a simulation model for assessing canopy age-class dynamics. Simulated results indicated that leaf area produced during rapid canopy expansion (60 DAP [days after planting], LAI [leaf area index] = 2.3) was largely composed of young leaves, with >35% of the LAI being <14 d old. However, 30 d later (90 DAP, LAI = 4.5) leaf area production was no longer sufficient to offset leaf aging and the percentage LAI <14 d old decreased to <10%, while leaves > 29 d old increased to 75%. This shift in age-class composition toward progressively older leaves altered the relative contribution of C from differing layers within the canopy. The middle portion of the canopy was the most important contributor of C early in crop growth, supplemented by roughly equal contributions from the lower and upper canopies. However, after 90 DAP the supply of assimilate from the upper canopy rapidly increased to >45% and that of the lower canopy decreased dramatically. Towards the end of the season (120 DAP), the middle and upper portions of the canopy were about equally divided in their importance to late-season C production. These results highlight the dynamic nature of age-related processes within the cotton canopy and the importance of leaf area development in sustaining whole-plant C production.

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Sybenga J.; Mastenbroek I., 1980: Combined genetic and cytological analysis of positive and negative interference in an interchange hetero zygote of rye secale cereale. Segregation of a translocation breakpoint and 2 marker genes, located in different non-translocation arms, showed strong negative interference between the segments bordered by the markers and the translocation. Cytological data indicated a similar...

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Gardner, W. U.; Strong, L. C.; Smith, G. M., 1936: An observation of pituitary tumors of the pituitary, ovaries and mammary glands in a mouse. A pituitary adenoma, bilateral ovarian granulosa-cell tumors, and multiple mammary adenocarcinoma were observed in 1 mouse. No definite physiological activity was observed that might be attributed to the pituitary adenoma. A uterine endometrial hy...

Egawa, Ryuki, 1961: On the drug-resistance of enteric bacteria 4 Drug-resistance of Shigella prevalent in JapanT. Shigella strains prevalent in Japan from 1949 to 1959 could easily acquire resistance to sulfanilamide. Ninety to 100% of S. flexneri 1b, 2a and 2b were highly resistant but 80 to 90% of S. flexneri 3a and S. sonnei were still sensitive. Although...

Bernaschek, G.; Bartl, W.; Wolf, G., 1983: Epiphyseal centers in the knee area - a sonographic and radiologic comparison. In 26 cases we checked the possibility of representation and measurability of the lower femur- and upper tibia-epiphysis by ultrasound and compared it to corresponding X-ray investigations. No remarkable differences were seen between the results a...

Walter-Matsui, R., 1983: The application of the European Community's guidelines for bathing beaches. Das Offentliche Gesundheitswesen 45(8): 413-416

Formigón, M.; Alsina, M.M.; Mascaró, J.M.; Rivera, F., 1992: Becker's nevus and ipsilateral breast hypoplasia--androgen-receptor study in two patients. Archives of Dermatology 128(7): 992-993

Sikdar A.K., 1970: Evaluation of some improved strains of mulberry d by feeding experiment. Indian Journal Of Sericulture: 26-30

Berns, A., 1971: Ministering to religious needs is important part of care. Modern Nursing Home 26(4): 4-4