: The Araceae family is one of the widely distributed plant families globally and among the native species representing this family in Libya, especially in Al-Jabal Al-Akhdar region, is Arum cyrenaicum. which has not been studied morphologically since 1977. Therefore, this study aims to give a detailed morphological characterization of Arum cyrenaicum. and verify that there are no other species of Arum in nineteen locations of Al-Jabal Al-Akhdar for two seasons 2019-2020, and as a study to be added to the Libyan flora data. The results of the field study showed the presence of Arum cyrenaicum. in all studied locations. The study was also able to record it for the first time at 14 new locations and did not record any other genus Arum species. The results of the morphological study also showed that it is a tuber discoid herbaceous annual plant, which grows in the early fall season. It is characterized by simple sagittate and hastate leaves with long petiole, single inflorescence (spadix), sail shaped, dark purple in color, and it consists of two parts (spathe, spadix). It has the smell of dung, is bisexual, monoecious, with female flowers situated at the bottom of male flowers, anther consistes of two thecae, superior ovary with single locule, parietal placentation, fruit berries red when ripe, and a seed shape ovate.
Background: Floral abnormality is one of the strange and exceptional phenomena, which gives popularity and attractiveness to ornamental flowers, although its causes are still a source of disagreement among many scientists.This study was carried out with the aim of documenting floral abnormality in Bauhinia variegata trees for the first time worldwide. Materials and Methods: Bauhinia variegata trees were monitored and monitored for seasons 2021-2022 in three locations in the city of Al-Bayda - eastern Libya, and flower abnormalities were documented photographically. Results: The results showed the registration of a new pattern of Bauhinia variegata after about 32 years of cultivation in of Al-Bayda city, libya with a clear increase in the number of petals (6-7-8 petals) superimposed (double) or contiguous, by up to 20% for each branch, with two petals often mottled, this mottled rarely disappears, the results also showed an increase in the number of stamens, and the emergence of some of them bilaterally incorporate with one of them turning into a petal. Conclusion: The cause of this abnormality is believed to be the drop in temperature during the two study seasons.
تعد أشجار بودرة العفريتBrachychiton populneus من أشجار الزينة المتكيفة بيئياً والمدخلة حديثا لمنطقة الجبل الأخضر- ليبيا. تهدف هذه الدراسة لمعرفة تأثير عدة معاملات مختلفة لكسر سكون بذور أشجار بودرة العفريت تضمنت معاملة النقع في حمض الكبريتيك المركز لفترات زمنية (10، 20، 30) دقيقة، ومعاملة الخدش (خدش ميكانيكي، خدش مع النقع في الجبريلين 100ppm، خدش مع النقع في أندول حمض البيوتريك 100ppm)، ومعاملة النقع في الماء الساخن لفترات زمنية (20، 30، 40) دقيقة، ومعاملة النقع في الجبريلين تركيز (100، 200، 300ppm)، وأخيرا معاملة النقع في أندول حمض البيوتريك تركيز (100، 200، 300ppm)، أظهرت النتائج تفوق معاملة النقع في حمض الكبريتيك المركز لمدة 30 دقيقة على جميع المعاملات بنسبة إنبات 92%، وبأقل متوسط زمن إنبات 3.56 يوم، تليها معاملات الخدش المختلفة، بينما كانت معاملات النقع في الهرمونات النباتية (GA3، IBA) غير فعالة في كسر السكون وتحسين الإنبات، وخلصت الدراسة إلى أن الطريقة الأمثل لكسر السكون الناتج عن صلابة غلاف بذور أشجار بودرة العفريت كانت المعاملة بحمض الكبريتيك المركز لمدة 30 دقيقة.
تعد أشجار Acacia saligna من الأنواع الغازية المنتشرة بشكل غير طبيعي خارج موطنها الأصلي، والمؤدية لحدوث اختلال في تنوع الأنواع النباتية المحلية، والمحاصيل الزراعية, ولانتشارها الملحوظ في منطقة الجبل الأخضر؛ تهدف الدراسة لمعرفة التأثيرات السلبية للمستخلصات المائية للأوراق، ولحاء، وبذور أكاسيا ساليجنا بتراكيز مختلفة (10, 20, 40, 60%) على إنبات بذور نباتي القمح، والشعير بثلاث مكررات وفقا للتصميم كامل العشوائية. أوضحت النتائج وجود فروق معنوية عالية في تقليل نسبة الإنبات، وزيادة زمن الإنبات بين تراكيز المستخلصات المائية، بالمقارنة مع الشاهد. حيث اظهرت مستخلصات البذور تسجيل أكبر نسبة تثبيطية مقارنة بمستخلصات الأوراق، واللحاء. كما لوحظ أن جميع المستخلصات بكافة تراكيزها أدت إلى اختزال أطوال المجموع الجذري، والخضري لكلا النباتين. وأن التركيز 60% هو الأكثر سمية في تثبيط جميع الصفات المدروسة، وأن نبات القمح هو الأكثر حساسية للمستخلصات المائية.
The sea height level along Libyan coasts is considered one of the environmental pressures that lives in soil vegetation characteristics. Therefore, two experiments were conducted (laboratory - pots) to find out the effect of irrigation with seawater at the concentration (10%, 20%, 40%, 60%) on germination of seeds and seedlings of Bauhinia variegate trees with an age of 6 months, and treated using pre-soaking in gibberellin acid ( GA3) 500ppm for 24 hours. The results showed that the exposure of seeds and seedlings of B.variegate trees to salinity led in two experiments to a significant decrease in percentage germination, an increase in means germination time, moreover, a decreased seedlings lengths, number of leaves/plant, shoot and root lengths, fresh and dry weight of seedlings compared with a control. The results also showed that the seeds and seedlings of B.variegate trees were able to germinate in different concentrations of seawater, except for 60% concentration which caused in death of seeds and seedlings, while pre-soaking treatment of seeds with gibberellin acid was not successful to overcome the salt stress, although slightly improved some studied traits. The results concluded that the possible seeds and seedlings agriculture of B.variegate trees in coastal locations in which seawater concentration did not exceed 40%, existed to be used in reforestation of degraded lands. Key words: Bauhinia variegata, seawater, GA3, Libyan coasts.
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