求翻译：【摘要】：通过盆栽模拟试验研究了重金属铅对西葫芦生物量的影响及活性氧自由基对根系活力和叶片叶绿素含量的影响。结果表明铅对植物生物量影响极大；铅对根系生长发育影响较大。重金属进入植物体后引起活性氧自由基含量上升,短期内可被清除酶歧化消除,但在长期和高浓度胁迫下,自由基对清除酶产生伤害并导致根系代谢酶受损。进入叶片中的重金属引起的超量活性氧自由基将叶绿素作为靶分子,致使叶绿素结构破坏、叶片失绿。是什么意思？

Abstract: The simulation of a heavy metal pot of lead on the squash biomass and reactive oxygen species on the root activity and leaf chlorophyll content. The results show that lead a great impact on plant biomass; lead a greater impact on root growth and development. Heavy metals into the plant cau

Summary: through elections as soon as possible the heavy metals research simulations potted plants to grow pumpkins biomass of reactive oxygen free radicals and the effects of bind the impact energy and leaf chlorophyll contents. Results indicate that lead to plant biomass greatly affect root system

[Abstract]: Has studied the heavy metal lead through the bonsai simulation test to the pumpkin biomass influence and the active oxygen free radical to the root system vigor and the leaf blade chlorophyll content influence.The result indicated the lead is enormous to the plant biomass influence; The

The "Summary": lead on squash through potted simulation test of the biological effects of free radicals and reactive oxygen species effects on root activity and leaf chlorophyll content. Results show that the effect of PB on plant biomass great; PB on root growth and greater impact. Once inside the

The "Summary": lead on squash through potted simulation test of the biological effects of free radicals and reactive oxygen species effects on root activity and leaf chlorophyll content. Results show that the effect of PB on plant biomass great; PB on root growth and greater impact. Once inside the