永久凋萎 meaning in English

permanent wilting
ultimate wilting

Arbuscular mycorrhiza can improve the ability of resisting drought from several aspects : hyphal enhances plants ' chances of absorbing water from soil ; it can improve plants ' phosphorus and another minerals ' nutrition , increase the content of chlorophyll ; observably enhance transpiration and stoma conduction ; reduce the flow of water , permanent languish point , stoma resistance ; change the balance of hormone , promote accumulation plant proline and capability of nitric reductive enzyme
丛枝菌根真菌可以通过以下几个方面增强植物抗旱性：通过菌丝增加植物对土壤水分的吸收；改善植物的磷营养及其他矿质元素营养；能显著提高蒸腾速率和气孔导度；干旱条件下降低植株叶片水势、永久凋萎点、叶片饱和亏、气孔阻力和恢复时间；改变激素平衡。