TY - JOUR
T1 - Biomass partitioning and ionomics of Macadamia with high manganese and low phosphorus concentrations
AU - Zhao, Xin
AU - Lyu, Yang
AU - Dong, Qianqian
AU - He, Xiyong
AU - Yue, Hai
AU - Yang, Liping
AU - Tao, Liang
AU - Gong, Lidan
AU - Zheng, Hongxu
AU - Wen, Sijie
AU - Lambers, Hans
AU - Shen, Jianbo
PY - 2023/5/22
Y1 - 2023/5/22
N2 - Knowledge of the ionome of plant organs helps us understand a plant's nutritional status. However, the ionome of Macadamia (Proteaceae), which is an important nut-producing tree, remains unknown. We aimed to characterise the allocation of biomass and nutrient-partitioning patterns in three macadamia genotypes. We excavated 15 productive trees (three cultivars at 21 years of age; two cultivars at 16 years of age) in an orchard. Biomass, nutrient concentrations, and contents of roots, stems, branches, and leaves were analysed. Dry weight of roots, stems, branches and leaves accounted for 14-20%, 19-30%, 36-52%, and 12-18% of total plant weight, respectively. No significant difference was found in the total biomass among the cultivars at the same age. Compared with most crop plants, macadamia had low phosphorus (P) concentrations in all organs (<1 g kg(-1)), and low leaf zinc (Zn) concentration (8 mg kg(-1)). In contrast, macadamia accumulated large amounts of manganese (Mn), with a 20-fold higher leaf Mn concentration than what is considered sufficient for crop plants. Leaves exhibited the highest nutrient concentrations, except for iron and Zn, which exhibited the highest concentrations in roots. The organ-specific ionomics of Macadamia is characterised by low P and high Mn concentrations, associated with adaptation to P-impoverished habitats.
AB - Knowledge of the ionome of plant organs helps us understand a plant's nutritional status. However, the ionome of Macadamia (Proteaceae), which is an important nut-producing tree, remains unknown. We aimed to characterise the allocation of biomass and nutrient-partitioning patterns in three macadamia genotypes. We excavated 15 productive trees (three cultivars at 21 years of age; two cultivars at 16 years of age) in an orchard. Biomass, nutrient concentrations, and contents of roots, stems, branches, and leaves were analysed. Dry weight of roots, stems, branches and leaves accounted for 14-20%, 19-30%, 36-52%, and 12-18% of total plant weight, respectively. No significant difference was found in the total biomass among the cultivars at the same age. Compared with most crop plants, macadamia had low phosphorus (P) concentrations in all organs (<1 g kg(-1)), and low leaf zinc (Zn) concentration (8 mg kg(-1)). In contrast, macadamia accumulated large amounts of manganese (Mn), with a 20-fold higher leaf Mn concentration than what is considered sufficient for crop plants. Leaves exhibited the highest nutrient concentrations, except for iron and Zn, which exhibited the highest concentrations in roots. The organ-specific ionomics of Macadamia is characterised by low P and high Mn concentrations, associated with adaptation to P-impoverished habitats.
KW - Biomass partitioning
KW - Ionomics
KW - Leaf zinc concentration
KW - Macadamia
KW - Manganese concentration
KW - Nutrient allocation
KW - Phosphorus concentration
KW - Plant organs
UR - http://www.scopus.com/inward/record.url?scp=85164256094&partnerID=8YFLogxK
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000993397200001
U2 - 10.1071/FP22197
DO - 10.1071/FP22197
M3 - Article
C2 - 37211614
SN - 1445-4408
VL - 50
SP - 559
EP - 570
JO - Functional Plant Biology
JF - Functional Plant Biology
IS - 7
ER -