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 النباتات... تستخدم الرياضيات... لترشيد استهلاك غذاءها ليلا .....(صورة)
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Plants have a built-in capacity to do maths, which helps them regulate food reserves at night, research suggests.
UK scientists say they were "amazed" to find an example of such a sophisticated arithmetic calculation in biology.
Mathematical models show that the amount of starch consumed overnight is calculated by division in a process involving leaf chemicals, a John Innes Centre team reports in e-Life journal.
Birds may use similar methods to preserve fat levels during migration.
The scientists studied the plant Arabidopsis, which is regarded as a model plant for experiments.
'Astonished'
Overnight, when the plant cannot use energy from sunlight to convert carbon dioxide into sugars and starch, it must regulate its starch reserves to ensure they last until dawn.
Experiments by scientists at the John Innes Centre, Norwich, show that to adjust its starch consumption so precisely, the plant must be performing a mathematical calculation - arithmetic division.
"They're actually doing maths in a simple, chemical way - that's amazing, it astonished us as scientists to see that," study leader Prof Alison Smith told BBC News.
"This is pre-GCSE maths they're doing, but they're doing maths."
The scientists used mathematical modelling to investigate how a division calculation can be carried out inside a plant.
During the night, mechanisms inside the leaf measure the size of the starch store. Information about time comes from an internal clock, similar to the human body clock.
'Sophisticated'
The researchers proposed that the process is mediated by the concentrations of two kinds of molecules called "S" for starch and "T" for time.
If the S molecules stimulate starch breakdown, while the T molecules prevent this from happening, then the rate of starch consumption is set by the ratio of S molecules to T molecules. In other words, S divided by T.
"This is the first concrete example in biology of such a sophisticated arithmetic calculation," said mathematical modeller Prof Martin Howard, of the John Innes Centre.
The scientists think similar mechanisms may operate in animals such as birds to control fat reserves during migration over long distances, or when they are deprived of food when incubating eggs.
Commenting on the research, Dr Richard Buggs of Queen Mary, University of London, said: "This is not evidence for plant intelligence. It simply suggests that plants have a mechanism designed to automatically regulate how fast they burn carbohydrates at night. Plants don't do maths voluntarily and with a purpose in mind like we do."
http://www.bbc.co.uk/news/health-22991838
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 Re: النباتات... تستخدم الرياضيات... لترشيد استهلاك غذاءها ليلا .....(ص (Re: بدر الدين احمد موسى)
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سلام يا بدر
| Quote: This is not evidence for plant intelligence. It simply suggests that plants have a mechanism designed to automatically regulate how fast they burn carbohydrates at night. Plants don't do maths voluntarily and with a purpose in mind like we |
الخواجات ديل بقوا مهوسيين بتفسير الحاجات
والزول بتاع الكوت دا أداهم النجيضة وكلامو طبعا سليم الرياضيات محتاجة لعقل وتفكير هل النباتات عندها عقل؟
المسألة فسيولوجية بحتة وهي جزء من التكوين البيولوجي للعالم ككل وحكمة الخالق فيه
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Re: النباتات... تستخدم الرياضيات... لترشيد استهلاك غذاءها ليلا .....(ص (Re: حمد عبد الغفار عمر)
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حمد يا فنانا
سلامات
ما تنسى يا حمد انه الرياضيات هي فهم الانسان لعلاقات موجودة في الطبيعة
يعني ممكن تعمل معادلة بتاعت تفاضل و تكامل لسرعة نمو نبات محدد في المتوسط و هذا يثبت ان هناك قوانين موضوعية تحكم حركة الاشياء
في هذا الكون لكن زي ما كانت بتقول استاذة درستنا الكيمياء في امريكا ان فهمنا لطبيعة التفاعلات لا يعني ان المواد المتفاعلة فاهمة ما تقوم به مثلما يفهم الانسان
وانما حركتها محكومة بعلاقات موضوعية و ظروف محددة ودا يثبت ان كلامك صاح برضو!
برضو يا حمد, اخدت كورس بتاع تفاضل و تكامل و الاستاذ كان دايما لما تجي سيرة الكفاءة line of least cost , يتحدث بان الك لاب تعرف حساب التفاضل و التكامل ههههههه
ملاحظته كالاتي, انه اذا جدعت اي شئ ل ك ل ب, ستجد ان ال ك ل ب سيجري مسافة محددة في اتجاه, ثم فجاة يحول اتجاهه و يتجه مباشرة لالتقاط الشئ و غالبا يفعلها بدقة و يقبضها في فمه, و لو حسبت المسافة التي جراها ال ك ل ب ستجد
بالضبط هي اقصر مسافة ممكنة, فكيف توصل ال ك ل ب لذلك؟
لاحظ نحنا البنعرف التفاضل و التكامل غالبا من ناخد اللفة الطويلة ههههههههه
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بدر الدين احمد موسى
حمد عبد الغفار عمر
فيس بوك
تويتر
انستقرام
يوتيوب
بنتيريست