A possible mechanism for phloem transport of boron in ‘Hass’ avocado (<i>Persea americana</i>Mill.) trees

Minchin, P. E. H.; Thorp, T.G.; Boldingh, Helen; Gould, Nick; Cooney, Janine M.; Negm, Fayek B.; Focht, Eric; Arpaia, Mary Lu; Hu, Hening; Brown, Patrick H.

doi:10.1080/14620316.2012.11512825

Cited by 17 publications

(10 citation statements)

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“…In vivo translocation of radiolabelled photosynthate, from leaves to fruit and root sinks, was monitored over 48 h using the Bremsstrahlung technique (Black et al, 2012) to follow the timeline of radiolabel flux from mature leaves. The soluble carbohydrate composition of phloem exudates from leaf petioles and fruit peduncles collected using the EDTA-facilitated technique was determined (Klages et al, 1998;Klages et al, 2001;Minchin et al, 2012;dos Santos et al, 2013). 14 CO 2 was applied to a fully mature leaf on an intact shoot and the leaf, petiole and shoot segments were analysed to determine individual soluble carbohydrates and the associated radiolabel.…”

Section: Introductionmentioning

confidence: 99%

Planteose is a major sugar translocated in Actinidia arguta ‘Hortgem Tahi’

Boldingh

Richardson

Minchin

et al. 2015

Scientia Horticulturae

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Section: Introductionmentioning

confidence: 99%

Planteose is a major sugar translocated in Actinidia arguta ‘Hortgem Tahi’

Boldingh

Richardson

Minchin

et al. 2015

Scientia Horticulturae

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“…However, the B transport in plants also involves other nutrients and compounds. As an example, the investigation of the phloem solution in some translocating species of B revealed substantial levels of polyols, which are able to form complexes with B (B-polyol) and promote the phloem transport of B over relatively long distances in plants (BROWN;SHELP, 1997;SOUZA;CANESIN;BUZETTI, 2012). However, in this work the phloem solution of the cherry tomato was not characterized and, therefore, it is not possible to affirm whether the nutritional status in K influenced the synthesis of polyols.…”

Section: Resultsmentioning

confidence: 84%

“…Reid (2014) states because cells depend on cell wall structure, B must be efficiently distributed in all plant tissues. In this context, the translocation of this element may confer better tolerance to deficiency or toxicity (BROWN;SHELP, 1997). However, depending on the species, it is considered a low mobile or immobile element in phloem (VAN GOOR;LUNE, 1980;BROWN;SHELP, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…In this context, the translocation of this element may confer better tolerance to deficiency or toxicity (BROWN;SHELP, 1997). However, depending on the species, it is considered a low mobile or immobile element in phloem (VAN GOOR;LUNE, 1980;BROWN;SHELP, 1997). In summary, B translocation involves active efflux channels and pumps with specific expression patterns depending on internal and external factors (LEAUNGTHITIKANCHANA et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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The retranslocation of boron is influenced by the nutritional status of cherry tomato plants

et al. 2020

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Boron (B) retranslocation may confer greater tolerance to B deficiency or toxicity, resulting in plants and fruits with better nutritional quality. Most plants do not demonstrate phloem mobility for B; however, some plants have natural mobility and others express it under stress conditions, such as nutritional stress. Therefore, we investigated the phloem mobility of B in cherry tomato plants with different nutritional status. The plants were cultivated in nutrient solution with adequate and insufficient doses of Potassium (K) and B. Furthermore, the plants received foliar fertilization with B in a mature leaf (F) in a localized form. The B content and amount in leaves near F were compared with leaves of the same age and position on control plants. The experiment was carried out in a protected environment and conducted in a randomized complete block design in a subdivided plot scheme with four replicates. Re-translocation of B between neighboring leaves was observed when the plant was without K deficiency and with B deficiency. In this nutritional status, leaves next to fertilized leaf with B (F) showed higher B amount when compared to leaves of the same position of control plants. Evidence suggests that retranslocation of B over relatively short distances (between leaves) can be influenced by the nutritional status the cherry tomato plants.

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“…Avocado trunks attacked by PSHB exhibit 'sugar volcanoes' consisting of perseitol, a polyol, and possibly its 7-carbon sugar form D-mannoheptulose (Minchin et al 2015). Excretions 1-15 cm in diameter and 0.5-5 cm high surround entry holes .…”

Section: Fusarium Diebackmentioning

confidence: 99%

Exotic plant disease threats to the New Zealand avocado industry and climatic suitability: a review

Everett

Siebert²

2018

NZPP

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The avocado industry was established in New Zealand from several importations dating back to 1907. Several serious pathogens found elsewhere in the world were not imported. A literature review and internet search were conducted to determine what serious avocado pathogens are not present in New Zealand and the potential impact they could have if they established. Relevant information was summarised for six pathogens determined to be the most serious of avocado and not known to be present in New Zealand: avocado sunblotch viroid (ASBVd); Pseudocercospora purpurea (cercospora spot); Ra aelea lauricola (laurel wilt); Fusarium sp. (fusarium dieback); Phellinus noxius (brown root rot); and Sphaceloma perseae (avocado scab). Laurel wilt, brown root rot, cercospora spot and fusarium dieback could become established in New Zealand if the climate here becomes warmer but establishment of ASBVd and avocado scab (which are not restricted to hot climates) is more likely.

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A possible mechanism for phloem transport of boron in ‘Hass’ avocado (Persea americanaMill.) trees

Cited by 17 publications

References 1 publication

Planteose is a major sugar translocated in Actinidia arguta ‘Hortgem Tahi’

Planteose is a major sugar translocated in Actinidia arguta ‘Hortgem Tahi’

The retranslocation of boron is influenced by the nutritional status of cherry tomato plants

Exotic plant disease threats to the New Zealand avocado industry and climatic suitability: a review

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