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تأثیر مایهزنی باکتری محرک رشد Bacillus simplex بر برخی ویژگیهای رشدی گیاه فلفل (Capsicum annuum L.) در شرایط مختلف رطوبتی | ||
دانش آب و خاک | ||
مقاله 8، دوره 34، شماره 3، مهر 1403، صفحه 125-141 اصل مقاله (587.38 K) | ||
شناسه دیجیتال (DOI): 10.22034/ws.2024.58833.2542 | ||
نویسندگان | ||
اسماعیل کریمی* 1؛ علی اصغر علیلو2؛ سیدبهمن موسوی3 | ||
1گروه علوم و مهندسی خاک- دانشگاه مراغه | ||
2گروه مهندسی تولید و زنتیک گیاهی، دانشکده کشاورزی، دانشگاه مراغه، ایران. | ||
3دانشگاه مراغه، گروه علوم و مهندسی خاک | ||
چکیده | ||
باسیلوسهای محرک رشد با قابلیت تولید پلیساکاریدهای برون سلولی میتوانند نقش مهمی را در القای مقاومت به تنش کمآبی به عنوان شایعترین تنش محیطی در گیاهان ایفا نمایند. برای بررسی این موضوع آزمایشی گلدانی بصورت فاکتوریل در قالب طرح کاملا تصادفی با مایهزنی بذور فلفل قرمز با باکتری محرک رشد باسیلوس سیمپلکس با قابلیت تولید پلیساکاریدهای خارج سلولی در سه سطح رطوبتی شامل 80، 60 و 40 درصد گنجایش مزرعهای در گلخانه انجام شد. بر طبق نتایج بهدست آمده هر چند تنش خشکی منجر به کاهش وزن خشک گیاه شد، اما مایهزنی باکتری باعث افزایش وزن خشک گیاهچههای فلفل به میزان 27% و 46% در شرایط تنش متوسط و تنش شدید آبی نسبت به شرایط شاهد هر تیمار آبی شد. سطح برگ به میزان 12% و 29% به ترتیب در شرایط تنش متوسط و تنش شدید آبی در اثر مایهزنی افزایش یافت. مایهزنی باکتریایی در سطوح آبی مطلوب و تنش متوسط به ترتیب باعث افزایش 37% و 42% وزن خشک ریشه در مقایسه با شرایط بدون مایهزنی گردید ولی وزن تر ریشه فقط در تنش شدید آبی با مایه-زنی باکتری 28% کاهش یافت. همبستگی مثبت و معنیداری بین صفات وزن خشک ریشه (86/0) ، وزن تر ریشه (86/0)، حجم ریشه (90/0)، طول ریشه (91/)0 ، تراکم سطح ریشه (91/0 )، چگالی بافت ریشه ( 60/0 ) و سطح ریشه ( 91/0) با عملکرد ماده خشک کل فلفل و همبستگی منفی بین قطر ریشه ( 61/0-) با عملکرد ماده خشک کل فلفل وجود داشت. | ||
کلیدواژهها | ||
پلیاتیلن گلیکول؛ تنش آبی؛ سطح ریشه؛ مرفولوژی کلونی باکتری؛ وزن خشک ریشه | ||
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