[基础科学]缺磷胁迫增强了马铃薯植株的耐旱能力.pdf

作物学报 ACTA AGRONOMICA SINICA 2009, 35(5): 875−883 /zwxb/ ISSN 0496-3490; CODEN TSHPA9 E-mail: xbzw@ DOI: 10.3724/SP.J.1006.2009.00875 缺磷胁迫增强了马铃薯植株的耐旱能力 王西瑶1 朱 涛2 邹 雪1 王吉生1 王 谧3 1 ; 2 ; 3 , 625014 : , , , 24 () , 60 (30 d ), 1/2 MS 16 d , 8% PEG8000 3 h, , , ; (Pro) (POD)(SOD) , ; Pro(MDA), ; Pro POD SOD : ; ; ; ; Drought Tolerance Enhanced by Phosphorus Deficiency in Potato Plants 1 2 1 1 3 WANG Xi-Yao , ZHU Tao , ZOU Xue , WANG Ji-Sheng , and WANG Mi 1 2 3 College of Agronomy; College of Resource and Environment; College of Biology and Science, Sichuan Agricultural University, Ya’an 625014, China Abstract: Many morphological and physiological adaptations responding to drought or phosphorus (P) deficiency have been re- ported. But the researches on the relationship between P nutrition and drought tolerance are less, and the results are not consistent. The majority findings indicate that sufficient P nutrition can promote photosynthesis and growth of roots, increase bound water proportion and cell membrane stability and so on, thus enhance the adult plant drought tolerance. But it is found in our prelimi- nary studies that potato grown in low-P environment showed a strong resistance to drought. This experiment aimed to verify and explain this phenomenon in morphological and physi