PDF(Pubmed)
Abstract：
UNASSIGNED: Phosphorus in the soil is mostly too insoluble for plants to utilize, resulting in inhibited aboveground biomass, while Carex can maintain their aboveground biomass through the presence of dauciform roots. However, dauciform roots lead to both morphological and physiological changes in the root system, making their primary mechanism unclear.
UNASSIGNED: A greenhouse experiment was conducted on three Carex species, in which Al-P, Ca-P, Fe-P, and K-P were employed as sole phosphorus sources. The plants were harvested and assessed after 30, 60 and 90 days.
UNASSIGNED: (1) The density of dauciform roots was positively correlated with root length and specific root length, positively influencing aboveground biomass at all three stages. (2) The aboveground phosphorus concentration showed a negative correlation with both dauciform root density and aboveground biomass in the first two stages, which became positive in the third stage. (3) Aboveground biomass correlated negatively with the aboveground Al concentration, and positively with Ca and Fe concentration (except Al-P). (4) Root morphological traits emerged as critical factors in dauciform roots\' promotion of aboveground biomass accumulation.
UNASSIGNED: Despite the difference among insoluble phosphorus, dauciform roots have a contributing effect on aboveground growth status over time, mainly by regulating root morphological traits. This study contributes to our understanding of short-term variation in dauciform roots and their regulatory mechanisms that enhance Carex aboveground biomass under low available phosphorus conditions.
UNASSIGNED: A greenhouse experiment was conducted on three Carex species, in which Al-P, Ca-P, Fe-P, and K-P were employed as sole phosphorus sources. The plants were harvested and assessed after 30, 60 and 90 days.
UNASSIGNED: (1) The density of dauciform roots was positively correlated with root length and specific root length, positively influencing aboveground biomass at all three stages. (2) The aboveground phosphorus concentration showed a negative correlation with both dauciform root density and aboveground biomass in the first two stages, which became positive in the third stage. (3) Aboveground biomass correlated negatively with the aboveground Al concentration, and positively with Ca and Fe concentration (except Al-P). (4) Root morphological traits emerged as critical factors in dauciform roots\' promotion of aboveground biomass accumulation.
UNASSIGNED: Despite the difference among insoluble phosphorus, dauciform roots have a contributing effect on aboveground growth status over time, mainly by regulating root morphological traits. This study contributes to our understanding of short-term variation in dauciform roots and their regulatory mechanisms that enhance Carex aboveground biomass under low available phosphorus conditions.
摘要：
■土壤中的磷对植物来说大多太不溶而无法利用，导致地上生物量受到抑制，而Carex可以通过dauciform根的存在来维持其地上生物量。然而,dauciform根导致根系的形态和生理变化，使其主要机制不清楚。
■对三种Carex物种进行了温室实验，其中Al-P,Ca-P,Fe-P,和K-P被用作唯一的磷源。收获植物并在30、60和90天后评估。
■(1)花叶根的密度与根长和比根长呈正相关,在所有三个阶段都对地上生物量产生积极影响。(2)前两个阶段地上磷浓度与红叶根密度和地上生物量均呈负相关。在第三阶段变得积极。(3)地上生物量与地上Al浓度呈负相关,与Ca和Fe浓度呈正相关(Al-P除外)。（4）根系形态性状是促进地上生物量积累的关键因素。
■尽管不溶性磷之间存在差异，随着时间的推移，树形根对地上生长状态有促进作用，主要通过调节根系形态性状。这项研究有助于我们了解在低有效磷条件下，树形根的短期变化及其调节机制，从而增强Carex地上生物量。
■对三种Carex物种进行了温室实验，其中Al-P,Ca-P,Fe-P,和K-P被用作唯一的磷源。收获植物并在30、60和90天后评估。
■(1)花叶根的密度与根长和比根长呈正相关,在所有三个阶段都对地上生物量产生积极影响。(2)前两个阶段地上磷浓度与红叶根密度和地上生物量均呈负相关。在第三阶段变得积极。(3)地上生物量与地上Al浓度呈负相关,与Ca和Fe浓度呈正相关(Al-P除外)。（4）根系形态性状是促进地上生物量积累的关键因素。
■尽管不溶性磷之间存在差异，随着时间的推移，树形根对地上生长状态有促进作用，主要通过调节根系形态性状。这项研究有助于我们了解在低有效磷条件下，树形根的短期变化及其调节机制，从而增强Carex地上生物量。
