Response of annual medics (Medicago spp.) and field peas (Pisum sativum) to high concentration of boron: genetic variation and the mechanism of tolerance

Paull, J. G.; Nable, Ross O.; Lake, Awh; Materne, M; Rathjen, A. J.

doi:10.1071/ar9920203

Cited by 62 publications

(36 citation statements)

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“…Genetic variation in response to boron has been reported for wheat and barley (Moody et al ., 1988 ;Nable, 1988 ;Paull et al ., 1988, Nable et al ., 1990 and medics and peas (Bagheri et al ., 1992 ;Paull et al ., 1992) . Tolerant lines of all these species maintain relatively low concentrations of boron in roots and shoots (Nable, 1988 ;Paull et al ., 1992) .…”

Section: Introductionmentioning

confidence: 99%

“…A limited range in genetic variation in boron tolerance was identified among Australian pea varieties (Bagheri et al ., 1992 ;Paull et al ., 1992) and preliminary investigations indicated that the variation in response to boron among a collection of Pisum sativum was greater than that in Australian commercial varieties (Materne, 1989 ;Paul] et al ., 1992) . The first major objective of the work reported here was to survey a large number of accessions to gain a comprehensive summary of the extent and geographical distribution of boron sensitivity and tolerance in Pisum sativum and to identify sources of tolerance for the breeding program .…”

Section: Introductionmentioning

confidence: 99%

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The response of Pisum sativum L. germplasm to high concentrations of soil boron

1994

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Tolerance to high levels of boron in the soil is an important aspect of the adaptation of crop varieties to southern Australian conditions . This paper reports investigations aimed at exploring the extent of genetic variation in Pisum sativum and at defining appropriate selection criteria for selection for boron tolerance in breeding programs .A collection of 617 accessions of Pisum was screened in controlled conditions and visually assessed for symptoms of boron toxicity. A high proportion of accessions were sensitive with only 3 .5% being more tolerant than any of the Australian varieties . Relatively high proportions of tolerant and moderately tolerant accessions originated from Asia and South America .In a second experiment the responses of selected tolerant accessions were evaluated with respect to different parameters . The objectives were to confirm the performance of the putative boron tolerant accessions and identify appropriate parameters for selecting boron tolerant genotypes . In addition to the visual assessment of boron toxicity, measurements at the time of harvest included dry matter yield and concentration of boron in tissues . Symptom expression was highly correlated with dry matter yield and concentration of boron in tissues under high boron conditions and so could be used as a non-destructive selection criteria . A low degree of symptom expression by tolerant accessions could usually be attributed to low levels of boron in the vegetative tissues . The results of this study indicate that considerable genetic variation exists among exotic accessions of Pisum sativum and tolerance to boron could be transferred to sensitive varieties .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The response of Pisum sativum L. germplasm to high concentrations of soil boron

1994

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“…However, according to the previous studies, they are mainly associated with B exclusion from roots, reduced translocation to shoots and avoidance by means of shallow root systems. The ability to restrict B uptake into the plants can minimize the physiological impairments caused by B toxicity (Nable, 1988;Nable et al, 1997;Paull et al, 1992;Hayes and Reid, 2004). On the other hand, an inherent ability to tolerate excessive B concentration in plant tissues (Torun et al, 2006) or the differential antioxidant response that may reduce B-toxicity damage in some species (Cervilla et al, 2007) was suggested.…”

Section: Introductionmentioning

confidence: 99%

Effects of excess boron on growth, gas exchange, and boron status of four orange scion–rootstock combinations

Sheng

Zhou

Wei

et al. 2010

Z. Pflanzenernähr. Bodenk.

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Field observations indicate that boron (B)-toxicity symptoms may occur in citrus plants from inappropriate foliar spraying or overfertilizing with B especially under low-rainfall conditions, where B can accumulate to levels that become toxic to plant growth. Previous work has indicated that different rootstocks can greatly influence the scion's tolerance to B toxicity, however, little is known about the response of different citrus scion-rootstock combinations to excess-B conditions. In the present study, we investigated the effects of excess B on plant growth, gas exchange, B concentration, and distribution of four scion-rootstock combinations, Newhall and Skagg's Bonanza navel orange (Citrus sinensis Osb.) scions grafted on Carrizo citrange (C. sinensis L. Osb. × Poncirus trifoliata L. Raf.) and Trifoliate orange (Poncirus trifoliata L. Raf.) rootstocks. One-year-old plants of the four scion-rootstock combinations were grown for 183 d in sand-perlite (1 : 1, v/v) medium under greenhouse conditions. The plants were irrigated with half-strength Hoagland's nutrient solution containing two B concentrations, 0.25 (control) and 2.50 (excess B) mg L -1 . It was found that, apart from the combination of Newhall grafted on Carrizo citrange, the dry weights in various parts of the other three combinations were reduced by the excess-B treatment. Furthermore, the plants of Skagg's Bonanza grafted on Carrizo citrange showed the highest growth reduction amongst the four scion-rootstock combinations. In most cases, the greater reductions in dry weight were found in roots as compared to the other plant parts under excess-B conditions, indicating that roots were more sensitive to B toxicity than the other tissues. In the case of Newhall plants grafted on Carrizo citrange, the entire plant growth was increased by excess-B treatment. Boron concentrations in all plants parts increased significantly by increasing the B supply in the nutrient solution. Leaves were the dominant sites of B accumulation and showed the greatest increase in B concentration compared to the other plant parts, as B concentration in the nutrient solution increased. Our results indicate that the combination of Newhall grafted on Carrizo citrange was more tolerant to B toxicity, while the combination of Skagg's Bonanza grafted on Carrizo citrange was relatively more sensitive to B toxicity, in comparison with the other scion-rootstock combinations. However, Newhall plants contained more B in leaves and in roots than Skagg's Bonanza plants when they were both grafted on Carrizo citrange, indicating that the mechanism underlying such great differential growth responses of the two scion-rootstock combinations to B toxicity may not be associated with B exclusion from roots or reduced translocation of B to shoots. Furthermore, B distribution in different plant parts implied that the mechanism was also unlikely related to altered distributions of accumulated B in plant tissues. However, inherent ability to tolerate excessive B concentration in plant tissues...

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“…The dominance of tolerant varieties in specific regions indicates that high concentrations of B exert a significant selection pressure and influence the distribution of wheat varieties. Further evidence of the influence of B on agriculture in southern Australia is derived from the fact that the pea variety Early Dun, introduced to Australia during the 19th century, is not only among the most tolerant of Australian pea varieties (Paull et al, 1992), but is also still one of the most widely grown.…”

Section: Boron Tolerance Of Wheat 253mentioning

confidence: 99%

“…and peas (Pisum sativum) (Paull et al, 1992) have identified an apparently similar mechanism controlling tolerance to B for these species. The low concentrations of B in roots indicate that the low concentrations measured in shoots Of tolerant lines result from the lower uptake of B by tolerant lines rather than restricted translocation of B from roots to shoots.…”

Section: Physiological Control Of B Tolerancementioning

confidence: 99%

Physiological and genetic control of the tolerance of wheat to high concentrations of boron and implications for plant breeding

Paull¹,

Nable

Rathjen³

1992

Plant Soil

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Physiological and genetic studies have been undertaken to further the understanding of genetic variation in response to high concentrations of B in the soil and so facilitate the breeding of tolerant varieties for cultivation in high B regions. Genetic variation in response to high concentrations of B has been identified for a number of crop and pasture species of southern Australia, including wheat, barley, oats, field peas and annual pasture medics. The wheat variety Halberd, which was the most widely grown variety in Australia during the 1970s and early 1980s, is the most tolerant of the current Australian wheat varieties. The mechanism of tolerance for all species studied is reduced accumulation of B by tolerant genotypes in both roots and shoots. Results from experiments of uptake kinetics indicate that control of B uptake is a non-metabolic process. The response of wheat to high B supply is under the control of several major additive genes, one of which has been located to chromosome 4A.

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Response of annual medics (Medicago spp.) and field peas (Pisum sativum) to high concentration of boron: genetic variation and the mechanism of tolerance

Cited by 62 publications

References 8 publications

The response of Pisum sativum L. germplasm to high concentrations of soil boron

The response of Pisum sativum L. germplasm to high concentrations of soil boron

Effects of excess boron on growth, gas exchange, and boron status of four orange scion–rootstock combinations

Physiological and genetic control of the tolerance of wheat to high concentrations of boron and implications for plant breeding

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