สืบค้นงานวิจัย
ROOT ANATOMY OF MODIFIED ROOT TRAINER PLANTS OF HEVEA BRASILIENSIS
Vinoth Thomas - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): ROOT ANATOMY OF MODIFIED ROOT TRAINER PLANTS OF HEVEA BRASILIENSIS
ผู้แต่ง / หัวหน้าโครงการ (EN): Vinoth Thomas
บทคัดย่อ (EN): Manipulation of root architecture in a perennial tree crop like Hevea brasiliensis assumes dual significances. Recently, polybag planting materials are being replaced with modern root trainer plants characterized by air pruned tap roots and numerous laterals. Air pruned tap root raises apprehension among the growers in further root development and establishment after field planting. Moreover, moisture stress and wind susceptibility due to changing climatic conditions are becoming severe in rubber growing areas. In this context attempts to modify the root architecture are detailed investigation on the structural organization of the tissues in the modified roots with respected to polarity was studied. Modification in root architecture could be achieved by allowing the air pruned roots to grow into a root elongation tube (RET) filled with potting medium, and attached tightly to the drainage hole of the root trainer cup. The root core developed in the RET after two months is characterized by 10-12 thick vertical roots, profuse laterals and fine roots. Average root elongation of the vertical roots within the RET was 1.8 cm per day. These plants were field planted and dug out after one month to elucidate the structural organization of root tissue with respect to polarity at different stages of its developments. Proportion of various tissues, number of pericycle layers, shape of stele, accumulation of starch and birefringent property of the cellulosic microfibrils in the pith are distinct for vertical and horizontal (lateral) roots. Lateral roots are characterized by distinct unilayered epiblema with large number of fine roots, cortex, single layered endodermis and pericycle, quadrangular vasculature with four protoxylem points, quadrangular pith devoid of starch grains and birefringent pith. Development of cork cells, circular stele with the development of secondary tissues, single layered endodermis multilayered pericycle, circular pith mild birefringent property and occurrence of starch in the xylem and pith cells were associated with the tap root and adventitious developed in the RET/soil. Birefringent of laterals assume taxonomic signigicance also. Lateral roots originate from the pericycle and maintains its polarity in the horizontal file where as the cut end of the tap root develop a wound periderm which transforms into a callus from which further root development takes place in the vertical file only under conducive conditions. The root architecture thus modified can increase the functionally active surface area for better absorption of soil resources and can ensure better growth and anchorage. Expected advantages of the planting material with modified root architecture in Hevea is described.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): root trainer plants
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

การอ้างอิง

Vinoth Thomas. "ROOT ANATOMY OF MODIFIED ROOT TRAINER PLANTS OF HEVEA BRASILIENSIS". ไม่ระบุหน่วยงาน. ม.ป.ป.

Vinoth Thomas. "ROOT ANATOMY OF MODIFIED ROOT TRAINER PLANTS OF HEVEA BRASILIENSIS". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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ROOT ANATOMY OF MODIFIED ROOT TRAINER PLANTS OF HEVEA BRASILIENSIS
Vinoth Thomas
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Elephant Dung as Potting Medium for Root Trainer Plants of Rubber (Hevea brasiliensis) Management of Purple Root Disease of Hevea Seedlings in Nursery Assessment of Rootstock Drought Resistance of Hevea with Root Hydraulic Conductance Cloning and expression of HbACO2 of Hevea brasiliensis Study on the Control of White Root Disease in Hevea Rubber Plant by Using Extract of Turmeric (Curcuma domestica) Plant Hormones and Oxidative Stress in Hevea brasiliensis Localization of Peroxidase Enzyme in the Bark of Hevea brasiliensis Effect of Temperature Constraints on Photosynthesis of Rubber (Hevea brasiliensis) Some Considerations Concerning the Yield Potential of Some Clones (Hevea brasiliensis) SUDDEN DIEBACK OF YOUNG BUDDED RUBBER (Hevea brasiliensis Muell. Arg.) PLANTS AT NURSERY STAGE UNDER HOT AND DRY CLIMATIC CONDITIONS
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