Bibliography: leaves 132-159. Boron efficiency in oilseed rape (Brassica napua L. and B. juncea L.) was investigated in a wide range of genotypes. Using a solution culture screening of 10 day old seedlings, root length best described shoot growth response, and was used to characterise a total of 65 genotypes. Varieties and breeders lines tolerant of B-deficient growing conditions were identified, and the screening process validated through field trials. B responses in plants sampled at the 'green bud' stage indicated that vegetative growth is important in B efficiency. Studies were conducted to investigate the mechanism of B efficiency in oilseed rape. Results suggest no association between B efficiency and the capacity to acidify the root rhizosphere, or an increased translocation of B from root to shoot. Boron retranslocation was also studied as a mechanism of B efficiency.

Bibliography: leaves 132-159. / xv, 159 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Boron efficiency in oilseed rape (Brassica napua L. and B. juncea L.) was investigated in a wide range of genotypes. Using a solution culture screening of 10 day old seedlings, root length best described shoot growth response, and was used to characterise a total of 65 genotypes. Varieties and breeders lines tolerant of B-deficient growing conditions were identified, and the screening process validated through field trials. B responses in plants sampled at the 'green bud' stage indicated that vegetative growth is important in B efficiency. Studies were conducted to investigate the mechanism of B efficiency in oilseed rape. Results suggest no association between B efficiency and the capacity to acidify the root rhizosphere, or an increased translocation of B from root to shoot. Boron retranslocation was also studied as a mechanism of B efficiency. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1999?

Bibliography: leaves 132-159. / xv, 159 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Boron efficiency in oilseed rape (Brassica napua L. and B. juncea L.) was investigated in a wide range of genotypes. Using a solution culture screening of 10 day old seedlings, root length best described shoot growth response, and was used to characterise a total of 65 genotypes. Varieties and breeders lines tolerant of B-deficient growing conditions were identified, and the screening process validated through field trials. B responses in plants sampled at the 'green bud' stage indicated that vegetative growth is important in B efficiency. Studies were conducted to investigate the mechanism of B efficiency in oilseed rape. Results suggest no association between B efficiency and the capacity to acidify the root rhizosphere, or an increased translocation of B from root to shoot. Boron retranslocation was also studied as a mechanism of B efficiency. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1999?

"June 2004." / Bibliography: leaves 135-159. / xi, 159 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Studies the mechanism underlying the morphological responses of boron- tolerance in plants by observing root and shoot responses to varied levels of subsoil boron in 2 barley varieties and 3 weed species common to agricultural areas of South Australia. Hypothesises that 4 mechanisms of boron-tolerance exist: 1. a physical barrier at xylem loading that also, 2., may include an efflux system; 3. enhanced sugar levels in shoot and root and 4, maintaining or increasing root biomass in the upper soil depths where the concentrations of boron are not toxic. / Thesis (Ph.D.)--University of Adelaide, School of Earth and Environmental Sciences, Discipline of Soil and Land Systems, 2004

Bibliography: leaves 234-256. Genetic studies of tolerance of durum wheat (Triticum turgidum L. var durum) to high concentrations of boron (B) were undertaken to identify genetic variation in response to B, the mode of gene action, number of genes and chromosomal locations of genes controlling tolerance. Results demonstrated that tolerance to B is under simple genetic control as observed in bread wheat. High levels of tolerance can be transferred into sensitive commercial varieties via backcrossing and selection can be performed during seedling growth at early generations.

Bibliography: leaves 234-256. / ix, 257 leaves, [12] leaves of plates : ill. (chiefly col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Genetic studies of tolerance of durum wheat (Triticum turgidum L. var durum) to high concentrations of boron (B) were undertaken to identify genetic variation in response to B, the mode of gene action, number of genes and chromosomal locations of genes controlling tolerance. Results demonstrated that tolerance to B is under simple genetic control as observed in bread wheat. High levels of tolerance can be transferred into sensitive commercial varieties via backcrossing and selection can be performed during seedling growth at early generations. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1996

Twenty-nine college females, aged 18-29, participated in a six month boron supplementation protocol to evaluate mineral and hormone status of athletes and non-athletes. All subjects were classified into activity and oral contraceptive groups as follows: athletes (n=16), non-athletes (n=13), oral contraceptives (n=12), and no oral contraceptives (n=17). Subjects were randomly assigned to receive a placebo or 3 mg of boron per day. Subjects' maximal oxygen consumption (VO₂max) was assessed as a baseline measurement and was used to confirm a difference between activity groups. Body fat, height, bone mineral density, and serum calcitonin and parathyroid also were baseline measurements. Subjects were measured at baseline and six months for the following: dietary intake, body weight, serum levels of 17-f-estradiol, progesterone, and testosterone, and plasma and urine levels of calcium, phosphorus, magnesium, and boron. Athletes had a Significantly greater VO₂max (p < 0.01) than did non-athletes. Subjects taking oral contraceptives had significantly lower serum estradiol (p < 0.05) as compared to subjects not taking oral contraceptives. Boron supplemented non-athletes had a significantly greater change in plasma calcium levels (p < 0.05) as compared to boron supplemented athletes, although the athletes had a significantly higher plasma calcium level (p < 0.05) at the baseline measurement. Control subjects (n=6) had a significantly greater change in dietary carbohydrate (p < 0.01) and protein intake (p < 0.05) as compared to subjects taking boron (n=23). Boron supplementation did not appear to significantly influence any of the parameters measured. However, boron supplementation combined with activity appeared to influence plasma calcium, while serum estradiol may be influenced by oral contraceptives. / Master of Science