Journal
NORDIC JOURNAL OF BOTANY
Volume 36, Issue 10, Pages -Publisher
WILEY
DOI: 10.1111/njb.01952
Keywords
allocation; nitrogen; phosphorus; plant organs
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The allocation of nutrients links ecosystem supply services to the functional traits and development of plants. This is particularly true for nitrogen (N) and phosphorus (P), which are important limiting resources in natural systems and are related to many aspects of plant biology. We investigated the scaling relationships associated with the N and P contents within specific organ types (needles, stems and roots) and among the different organs of Picea seedlings from nine taxa grown under greenhouse conditions. Our results showed that N and P contents were highly correlated within and between plant organs. A common isometric scaling relationship (scaling exponent approximate to 1) between N and P was observed in needles, stems, and roots. Howver, the N and P contents had different scaling exponents in different plant organs. The scaling relationships of the N content across different organ types tended to be allometric (scaling exponent < 1) between stems and non-stem organs, and isometric between needles and roots. For P contents, similar scaling relationships were found among the three organs. These results improve our understanding of nutrient allocation strategies within and between major plant organs.
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