Templin
ActiveLactuca sativa L. · Lettuce
Nunhems B.V., Nunhems B.V.
NL
8 records
Diseases
Lettuce tissue necrosis
Lactuca sativa L.
Tissue necrosis in lettuce is a symptom complex caused by infectious pathogens (fungi, viruses, bacteria) as well as physiological stresses or genetic incompatibility during hybridization.
In the reference 424 varieties crop Lettuce, where this is mentioned in the description.
Infectious causes of necrosis include Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. lactucae (accompanied by vascular and root necrosis), viral infections such as LNYV or INSV, and bacterial leaf spot caused by Xanthomonas vitians. Root rots, provoked by Pythium spp., lead to secondary tissue necrosis due to disruption of plant nutrition.
Physiological necrosis develops independently of pathogens under the influence of high temperatures, water deficit, and mechanical damage, leading to the death of parenchyma cells. Genetically determined necrosis can also occur as a result of an autoimmune reaction due to the incompatibility of NLR gene alleles in seedlings.
Resistance to necrotic lesions caused by pathogens is genetically controlled: monogenic resistance has been described for protection against Fusarium oxysporum, and for protection against the INSV virus, quantitative trait loci (QTLs) have been identified, such as qINSV2.1, localized on the second chromosome.
General information about the subject — on the page Tissue necrosis.
Varieties of Lettuce mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Malenita
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan, NL
NL
8 records
Livius
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
9 records
Liberkin
ActiveLactuca sativa L. · Lettuce
NUNHEMS
NL
8 records
Jagger
ActiveLactuca sativa L. · Lettuce
NUNHEMS
NL
8 records
Clarke
ActiveLactuca sativa L. · Lettuce
NUNHEMS
NL
9 records
Caravel
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
10 records
Binex
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
7 records
Platinas
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Murai
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
HR
5 records
Claudius
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V. (NL)
HR
NL
5 records
Wismar
ActiveLactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
FR
6 records
Xiomara
ActiveLactuca sativa L. · Lettuce
NANNES JEROEN
NL
8 records
Yecla
ActiveLactuca sativa L. · Lettuce
Enza Zaden, NL
NL
6 records
Touareg
ActiveLactuca sativa L. · Lettuce
Seminis Vegetable Seeds
HR
NL
5 records
Victorinus
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
7 records
Tacitus
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Skyphos
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Rosaine
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Rafael
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
7 records
Moonred
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
7 records
Lozano
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
5 records
Mesa 659
ActiveLactuca sativa L. · Lettuce
C. Sperling (DE)
IT
SI
4 records
Maximus
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records