Penebalan Dinding Sel Xilem Tanaman Kedelai [Glycine Max (L.) Merr.] Var. Grobogan Akibat Cekaman Ganda Interferensi Teki (Cyperus Rotundus L.) Dan Kekeringan

Anatomical changes are good indicators used to know influence environmental stress on plant. The objective of this research is to study the multiple stress effect of purple nutsedge (Cyperus rotundus L.) interference and drough on the xylem cell wall thickening of stems, roots and leaves of soybean [Glycine max (L.) Merr.] Var. Grobogan. This research was carried out using two experimental Completely Randomized Designs (CRD) (3X3), i.e. purple nutsedge interference (control, three and six purple nutsedge) and drought stress (control, mild and severe). The results showed that multiple stress purple nutsedge interference and drought led to the addition of xylem cell wall thickness of stem, root and leaves .The higher level of interference and drought, xylem cell walls thicker

Pengaruh Alelokimia Ekstrak Tanaman Padi (Oryza Sativa L. Var. Ir64) Terhadap Perkecambahan Dan Perkembangan Kecambah Kedelai (Glycine Max L.)

The aim of this research is to know the allelochemicals effect of rice var. IR 64 residues extract on germination and growth soybean var. Grobogan seedling. This experiment uses completely randomized factorial design (3x5). The fist factors is extract resources (root, straw, and hull) and secont factor is level concentration extrac (0%, 25%, 50%, 75%, dan 100%) with 5 replicates. Data analysed using ANOVA and DMRT.The results showed that allelochemicals from residue of rice IR 64 extract inhibit the germination and growth soybean var. Grobogan seedling, the higher concentration of the treatment the greater inhibition. Inhibition most likely caused by a hull rice extract