模拟增温对水葱(Scirpus validus)输导组织的影响

Effect of Conducting Tissue of Scirpus validus to Simulated Warming

采用人工环境控制系统封顶式生长室(STC),研究云南高原湿地优势植物水葱(Scirpus validus)输导组织对模拟增温的响应。结果表明:增温显著降低了水葱的导管横切面周长、导管横切面面积、筛管横切面面积和净光合速率,但显著增加了水葱的筛管横切面密度。水葱的导管横切面周长、面积均与净光合速率显著正相关,而筛管横切面密度与净光合速率显著负相关。

We studied the responses of the conducting tissues of a plateau wetland dominant plant species Scirpus validus in Yunnan to the simulated warming,by using sealed-top chamber of artificial environment control system(STC).The increasing temperature significantly decreased the transection circumference and area of the vessel,the transection area of the sieve tubes,as well as the net photosynthetic rate.However,increasing temperature significantly increased the transection density of the sieve tube.The transection circumference and the area of the vessel were positively correlated with the net photosynthetic rate,while the transection density of the sieve tube was negatively correlated with the net photosynthetic rate.