Respiration in wood: integrating across tissues, functions and scales.
Respiration in wood: integrating across tissues, functions and scales.
复制标题
木材的呼吸:跨组织、功能和尺度的整合。
DOI:
10.1111/nph.16354
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Meir P
中科院分区:
文献类型:
--
作者:
Meir P
Success in life for any seedling requires the simultaneous acquisition of resources from soil 25 and atmosphere. This must be coupled to an ability to distribute these resources to the 26 points of use above and below ground, and to house the distribution system within resilient 27 woody structures. The cells comprising these lignified structures–roots, stems and 28 branches–need to be constructed, maintained and defended. To do so requires chemical 29 energy which is almost entirely derived from respiration. However, despite the fundamental 30 role woody tissue plays in driving life in most terrestrial ecosystems, it has received much 31 less research attention than has the physiology of its greener counterpart, the leaf. To some 32 extent this difference reflects the challenge of understanding the metabolically distinct 33 tissues and related fluid and solute movements that occur simultaneously in wood. 34 Advanced models of xylem and phloem function and of cambial growth have existed for a 35 few years (eg, Hölttä et al. 20072006, 2010, de Schepper et al. & Steppe 2010, Mencuccini 36 et al. 2013), but Salomón et al’s new paper (NP page details) takes a notable step forward 37 integrating and advancing these approaches. Their model ‘TReSpire’combines 38 representations of the essential properties of both phloem and xylem, the use of phloem-39 derived sugars to produce irreversible cellular growth, together with the activity and 40 physical properties of associated tissues (eg, cambium, parenchyma, bark). TReSpire 41 describes the variation in the flux of carbon dioxide (CO2) from tree bark, its underlying 42 respiratory production by both growth and maintenance processes, and its transport, 43 limited by energy expenditure and the fundamental physical constraints of pH, 44 concentration gradients, stem carbon density and diffusive resistances. 45
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作者:
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DOI:
--
发表时间:
2004
期刊:
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