ﺑﺮرﺳﯽ ﺗﻨﺶ ﺧﺸﮑﯽ ﺑﺮ ﺟﻮاﻧﻪزﻧﯽ اﮐﻮﺗﯿﭗﻫﺎي ﺧﻠﺮ (Lathyrus sativus)

Effect of drought stress on the germination of grass pea (Lathyrus sativus)

ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ ﺗﺎﺛﯿﺮ ﺗﻨﺶ ﺧﺸﮑﯽ ﺑﺮ ﺟﻮاﻧﻪزﻧﯽ اﮐﻮﺗﯿﭗﻫﺎي ﺧﻠﺮ آزﻣﺎﯾﺸﯽ ﺑﺼﻮرت ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮكﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ 3 ﺗﮑﺮار اﺟﺮا ﮔﺮدﯾﺪ. ﻋﻮاﻣﻞ آزﻣﺎﯾﺶ ﺷﺎﻣﻞ اﮐﻮﺗﯿﭗﻫﺎي ﺧﻠﺮ در7 ﺳﻄﺢ ﺷﺎﻣﻞ ﺷﯿﺮاز، ﺑﻢ، ﺑﺎﻓﺖ1، ﺑﺎﻓﺖ2، راﺑﺮ، ﺑﺮدﺳﯿﺮ و ﮐﻮﻫﺒﻨﺎن و 5 ﺳﻄﺢ ﺗﻨﺶ ﺧﺸﮑﯽ، ﭘﺘﺎﻧﺴﯿﻞﻫﺎي و0 0/05،- 0/15،- 0/3و- 0/75- ﻣﮕﺎﭘﺎﺳﮑﺎل ﺑﻮدﻧ.ﺪ ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ درﺻﺪ ﺟﻮاﻧﻪزﻧﯽ ﺗﺎ ﭘﺘﺎﻧﺴﯿﻞ 0/75- ﻣﮕﺎﭘﺎﺳﮑﺎل ﺗﻔﺎوت ﻣﻌﻨﯽداري ﺑﺎ ﺷﺎﻫﺪ )ﭘﺘﺎﻧﺴﯿﻞ 0 ﻣﮕﺎﭘﺎﺳﮑﺎل( ﻧﺪاﺷﺖ. ﺳﺮﻋﺖ ﺟﻮاﻧﻪزﻧﯽ ﺗﺎ ﭘﺘﺎﻧﺴﯿﻞ 0/05- ﻣﮕﺎﭘﺎﺳﮑﺎل ﺗﻔﺎوت ﻣﻌﻨﯽداري ﻧﺪاﺷﺖ و ﺑﺎ ﮐﻤﺘﺮ ﺷﺪن آب در دﺳﺘﺮس ﺑﺬرﻫﺎ ﮐﺎﻫﺶ ﯾﺎﻓﺖ. ﺑﺎ اﻓﺰاﯾﺶ ﺷﺪت ﺗﻨﺶ ﺧﺸﮑﯽ اﮐﻮﺗﯿﭗﻫﺎي راﺑﺮ و ﮐﻮﻫﺒﻨﺎن ﮐﻤﺘﺮﯾﻦ ﮐﺎﻫﺶ در ﻃﻮل رﯾﺸﻪﭼﻪ و ﺳﺎﻗﻪﭼﻪ را ﻧﺸﺎن دادﻧﺪ.

In order to study effect of drought stress on germination of some Grass pea (lathyrus sativus.) ecotypes a factorial experiment in completely randomized design arrangement whit three replicate was conducted. Factors include drought stress at 5 levels (0, -0.05, -0.15, -0.3, -0.75) and seven ecotypes of grass pea (Shiraz, Bam, Baft1, Baft2, Rabor, Bardsir and Kohbanan). Investigate parameters in this experiment were included speed of germination, germination percentage, shoot length and root length. Results showed that in germination percentage up to -0.75 Mpa potential was not significantly different from control (0 Mpa). Speed of germination up to -0.05 Mpa was not significantly different and decreased with less water available to the seeds. increased drought stress, the ecotypes of Rubber and Kohbanan showed the least decrease in root and shoot length.