eprintid: 7735
rev_number: 12
eprint_status: archive
userid: 17
dir: disk0/00/00/77/35
datestamp: 2014-04-02 09:56:45
lastmod: 2014-04-02 09:56:45
status_changed: 2014-04-02 09:56:45
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@CGIAR.ORG
creators_name: Raju, P S
creators_name: Osman, M A
creators_name: Soman, P
creators_name: Peacock, J M
icrisatcreators_name: Raju, P S
icrisatcreators_name: Osman, M A
icrisatcreators_name: Soman, P
icrisatcreators_name: Peacock, J M
affiliation: ICRISAT(Patancheru)
country: India
title: Effects of N, P and K on Striga asiatica (L.) Kuntze seed germination and infestation of sorghum
ispublished: pub
subjects: s1.4
subjects: s2.7
full_text_status: restricted
abstract: Sorghum (Sorghum bicolor (L.) Moench) plants were grown in pots with 12.5 and 50 mg applied N kg−1 soil. With an increase of soil N, the Striga asiatica (L.) Kuntze infestation, as well as the sorghum shoot dry matter losses due to infestation, decreased. The relative differences in stimulant capacity to induce Striga seed germination among the four sorghum genotypes were not consistent over the 0 to 150 mg N 1−1 range. The sorghum root exudate was considerably more active at 0 mg N 1−1, than at 30 mg N 1−1, and the stimulant produced at 150 mg N 1−1 failed to induce Striga seed germination. Presence of N in the growth medium considerably reduced the effectiveness of the stimulating substance produced by sorghum roots, whereas K promoted stimulant activity only in the absence of N. The presence or absence of P in the growth medium did not affect Striga seed germinability, probably due to the inability of this element to interfere with the production or activity of the stimulating substance from the host plants. It can be concluded, therefore, that sorghum plants seem to produce active root exudate only in conditions of N deficiency
date: 1990
date_type: published
publication: Weed Research
volume: 30
number: 2
publisher: Blackwell Publishing
pagerange: 139-144
refereed: TRUE
issn: 0043-1737
official_url: http://dx.doi.org/10.1111/j.1365-3180.1990.tb01697.x
related_url_url: http://scholar.google.co.in/scholar?as_q=Effects+of+N%2C+P+and+K+on+Striga+asiatica+%28L.%29+Kuntze+seed+germination+and+infestation+of+sorghum&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&as_sdt=0%2C5
related_url_type: pub
funders: IDRC(Canada)
citation:   Raju, P S and Osman, M A and Soman, P and Peacock, J M  (1990) Effects of N, P and K on Striga asiatica (L.) Kuntze seed germination and infestation of sorghum.  Weed Research, 30 (2).  pp. 139-144.  ISSN 0043-1737     
document_url: http://oar.icrisat.org/7735/1/WeedRes_30_139-144_1990.pdf